Used price: $12.95
Collectible price: $10.00
But beware of the so called "Digital Edition" which contains only half the number of pages as the paperback edition. As a student of mine recently discovered, the digital edition does not include the numerous examples which are the heart and soul of all the Schaum's outlines.
Amazon, by listing the digital edition as simply another edition of the book the way it would list both hardback and paperback editions of a book that both contain the same text, is misleading those who think they are are loading the entire text of the original book.
I suggest that digital and non-digital versions of a book that are substantially different be presented separately or better yet, the digital version should have the complete text. Amazon has built up a deservedly good reputation of truthfully presenting its products. Why spoil it?