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There are several performance tips given that I never thought about and they really work . . . I, of course, had to test them for myself.
If you are like me, you don't have time to test every scenario to find out which technique is best for every situation, this book helped to guide me in the right direction.
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The strenght of this book lies in its rigorous introductions to the relevant theoretical concepts in self-organization, followed up by a general debate of self-organization versus competing explanations. The book spends many chapters looking at particular natural phenomena in detail, and examines possibilities for self-organization in these. In spite of the fact that these chapters have different authors, they follow each other well. The book is unusually well put together for this kind of collection of works by multiple authors.
The majority of the case study chapters involve studies of social insects, which narrows the topic a little in comparison with the more ambitious title. Self-organization also occurs elsewhere in biology, and personally I am a little dissapointed that a wider range of case studies were not chosen for the book. This could have spawned more interest and further work in other areas of the field.
However, the book is definitely well worth reading for biologists and other scientists interested in self-organization, and represents a major step towards establishing studies of self-organization in biology as a serious field.
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Up till now, I had not been overly impressed with products by Penumbra for the d20 system. That has changed. Touched by the Gods is a collection of fifteen Cults, Churches and Cabals (also in the form of prestige classes). The strongest point for this product is the rich detail given regarding each of these institutions.
After reading the book twice, it is my opinion that the Churches and classes asscoiated are best suited either to NPC's as support and framework for the campaign OR for all members of the party be somehow related to the group in question.
Either way, Touched by the Gods is very rich and rewarding reading in a nice hardback package.