It is interesting that this book is being published for the first time since much of the material comes from Professor Mares's work with small desert mammals during the seventies. Mares, who is the Curator of Mammals and Director of the Sam Noble Oklahoma Museum of Natural History at the University of Oklahoma is also the author of Encyclopedia of Deserts (1999). Perhaps he has been too busy to publish what is essentially a popular work. Since the book includes reports on his field work and that of his students into the nineties, maybe this book is a way of rounding out a career.

Regardless of the reason for the material finally finding publication, we are the better for it. Part memoir, part fieldwork journal, and part travelogue, A Desert Calling is that rare scientific tome that engages our adventurous spirit through a vivid and lively presentation while at the same time giving us a concrete sense of the animals and their habitats. As the late Stephen Jay Gould expresses it in the Foreword, Mares writes with "a verbal freshness (and a fine sense for a good yarn) that will delight even the most sophisticated urbanite...." (p. xi)

The book is also beautifully edited and presented with handsome page layouts. Chapter beginnings and major paragraph breaks feature photo icons of the small desert rodents that were the focus of much of Mares's work. The text is interspersed with black and white photos of animals and the forbidding desert climes that he and his fellow field biologists encountered on three continents. There are four maps to help us locate these places. Mares includes an appendix giving both the common and scientific names of species mentioned in the text organized geographically. There are 14 pages of suggestions for further reading ordered by chapter.

Mares's travels include the Sonoran and Mojave deserts in the American southwest, the Monte Desert and the Patagonia and Caatinga regions in South America, and the Dasht-i-Kavir in Iran and the Sahara in Egypt. He traveled to Argentina during the years of the Dirty War and was in Iran just before the fall of the Shah and the rise of the Ayatollah Khomeini. He lived through blinding sandstorms and heat so oppressive that he sought relief in pig water and mud laced with pig feces. He endured stings from hoards of vicious insects in landscapes nearly as barren as the moon with shaded Fahrenheit temperatures in the 130's. (p. 181) He encountered bureaucratic obstruction that would try the patience of a saint, poverty that would move even Scrooge to tears, and enough danger to satisfy a jaded CIA agent.

But above all he reports on the animals and how they live. He includes the discovery of a number of new species and genera of mammals, and three major ecological findings, all having to do with convergent evolution. Seeking the animal in the Monte Desert of Argentina that is the analogue of the kangaroo rat of the North American Sonoran Desert he inexplicably finds none. But then by happenstance he becomes aware of an extinct marsupial skeleton collected by famed biologist George Gaylord Simpson that fits the expected convergence to a tee. Indeed the animal had gone extinct only a million years previous which explained why none of the other rodents had yet evolved to fill that niche. (p. 126)

Mares also demonstrates that the jerboa of the Sahara, which is taxonomically nearly identical to the kangaroo rat, a fact well know for many decades, is not the whole story. It turns out that their diets and therefore some parts of their anatomy, including their teeth of course and presumably their digestive systems, are more different than was previously supposed. Mares realized this because he discovered that while kangaroo rats are seed specialists, the convergent jerboas have a more varied diet including plants and even crickets. After some further research, Mares understood that the bipedal adaption of the jerboas and kangaroo rats is an adaptation to allow them to run (hop!) away from predators.

To my mind the most interesting discovery was that the rock hyraxes of Africa have a nearly exact counterpart in the rock cavies of Caatinga in Argentina. As Mares expresses it (p. 202), they "are about as distantly related as mammals can be, [but they] not only look alike, but are similar in almost all aspects of their reproduction, ecology, and behavior." In a splendid example of natural selection at work, Mares points to their unique but similar rock pile environments as strongly shaping their morphology and behavior.

Perhaps what Mares does best that other scientists that work in distant places do not always do so well is to shed light on not only the climate and the species but on the local people, what they are like and how they live. His description of the isolation of some of the people in the Monte and the Chaco ("El Impenetrable" in Spanish, which Mares calls a "land of thorns") in Argentina is almost like reading about lost tribes from ancient times. His encounters with locals sometimes reminded me of something from a wild west movie of my childhood.

Also very interesting was his account of the discovery of a new species, the golden vizcacha rat on pages 257-259. I also liked his touching recollection of coming home for Halloween just in time to join his two boys for trick or treating on page 275.

Bottom line: this engaging and colorful book allows us to experience the hard work, pure drudgery, quiet contentment, and the sometimes thrilling exhalation of field work through the eyes of a working scientist with a gift for exposition.

Michael Mares' book grew on me enormously as I read it. The combination of his series of wild experiences along with his enthusiasm for the research puzzles he confronts made this book read almost like a double thriller. This could be read as a travel book, very much like Eric Hansen's books, with a bonus of learning a lot about nature, evolution, ecology, etc. Or, it could be read as a book of ecology and evolution with the bonus of extraordinary adventures. At first, I kept on reading the book more for the adventures and then realized that my excitement about the science was growing. I have never had a book sneak up on me in this way.

We are quite used to hearing about the rainforest and the worries about its loss. We hear less about the loss of deserts. Let the military test there, let off-track entertainment vehicles bounce there, let toxic wastes accumulate there; they are not good for much else, goes the common view. They are uncomfortable places to visit, and they can't be turned to agriculture. Michael A. Mares, in _A Desert Calling: Life in a Forbidding Landscape_ (Harvard), has a completely different view. Mares has spent his professional life studying the deserts of the United States, Argentina, Iran, and Egypt. He undoubtedly knows plenty about plants, insects, birds, and snakes of these areas, but he is a specialist in the mammals that have evolved to live in such harsh conditions. Desert rats, mice, armadillos, and gerbils have been his study, and he has here (note the double meaning of the title) assembled a description of his life's work, as well as an attempted explanation of just why he has spent so much time in places the rest of us could not stand. His thoughtful and funny stories are a sort of autobiography, and he has much to tell us about the exotic animals that he wants better appreciated.

There are some peculiar beasts out there. The kangaroo rat has a nose exquisitely tuned to find buried seeds, and can filter sixty seeds from sand in a second. There are penguins in the desert in Patagonia. There are a few rodents on different continents who can live on the leaves of the saltbush, leaves that have a protective outer layer of cells full of salt. They have special teeth, or in one case, special dental hairs, that strip away the inedible layer to get to the green below. There are deadly assassin bugs. Mares describes staying in some of the most unpleasant regions of the world, and admits that when he is busy with academia and home, he longs to get to the desert, but it works vice versa, too. He is almost killed by fungus infesting his lungs after climbing through guano deposits in a New Mexico cave. He is nearly crushed by trees falling during a storm on a bat hunt in Costa Rica. Some of the most surprising specimens described here are humans, and Mares has plenty of funny stories.

_A Desert Calling_ is full of light moments, and near-disasters that are pleasant to recall because they are over. However, Mares has a good deal serious to say about the study of desert animals, and in the larger view, about taxonomy in general. "If you do not know the taxonomy and systematics of the organisms you study - if you cannot identify them correctly and understand how they are related - then you cannot study them in any meaningful manner." Research in "bigger" topics such as ecology is only possible when taxonomists have gone to the field beforehand and identified one creature from another and settled their ranges and evolutionary relationships. Mares has found and been responsible for the first scientific descriptions of many mammals, and knows that there are still plenty out there which have yet to be properly catalogued and studied. Over and over, he comes across specimens about which no one has basic answers: Are they diurnal or nocturnal? Do they live in colonies? Do they hibernate? What do they eat? There is an enormous amount of basic science brightly reported here, and an enormous amount that is yet to be done.

This is the only work dedicated in whole to mammals in and around Oklahoma and the south central plains, and as such, it is an indispensible tool for my research as a grassland ecologist. Range maps for each species and references make this worth its weight in, uh, mammals!

This monograph is a detailed analysis of the ecology, distribution, and biogeography of the mammals of Salta Province, Argentina, an area of great habitat complexity. Habitats range from high Andean deserts to rain forests to lowland deserts and the Great Thorn Forest. The mammals of each habitat are discussed, and the faunas among the habitats are compared. Information on the ecology of each species is presented. Several biogeographic and evolutionary patterns of colonization, speciation, and coexistence are clarified. More than 100 species are considered.

The strength of this book is the number of topics it covers. Its main weakness, though, is the same. By including so many topics, the reader actually learns very little. Even a child doing a class paper on a subject in this book would have to draw upon other resources. The book is best suited for people who have little or no knowledge of deserts. Unfortunately, that means kids. But most kids would never pick this book up since there isn't one colored photograph in the book. Even the black and white photos are not the greatest quality. For its size and price, the book was a disappointment. But then, I live in the desert so maybe I was hoping for something a bit more useful and informative.

Chris Alexander Las Cruces, New Mexico

This book seems to have everything there is about deserts. I learned that deserts have lions, penguins, kangaroos, many spiders, scorpions and other animals, even fish and frogs. There are also many plants, with strange things like cactus and boojum trees. Even elephants live in the desert. I think the book is like an exploring trip from one desert to the other. I wish it had more pictures but it is easy to understand and has great maps. The book helped me write a report on deserts. I got an A. I would like to visit a desert to see what it is like to live there. I never knew deserts would be so interesting. They are too cool.