McMartin was one of several cases in the 80's involved in this debate. The best NPOV book on McMartin is Hechler, D. (1988). The Battle and the Backlash: The Child Sexual Abuse War. Lexington,Massachusetts: Lexington Books. This book covers both sides of the issue extremely well with interviews from the actual participants. Hechler's work has appeared in the NY Tinmes, the Village Voice and the New York Daily News. Earl is biased and so is Underwager's IPT. 

In regard to Prometheus Books, it has been stated on another wiki talk page:
"Prometheus books is not a credible source on child sexual abuse. Their "Human Sexuality" section throughout the 80s and 90s was edited by Vern Bullough, who is also a board member of Paidika, the Dutch pro-paedophile magazine. Under Bullough's editorship, Prometheus published a range of pro-paedopihlia titles, including the Eberles, as well as the book "Children's sexual encounters with adults" in which a number of contributors espoused pro-paedophile views. I am astonished at the inconsistency with which certain Wikipeida editors attribute credibility to different sources on child sexual abuse. The Eberles' history with child pornography is in the public domain and it has been for almost twenty years. Now we find editors claiming that the Eberles (and John Earle, a contributor their book) are considered credible sources, whilst all sources (including major newspapers, magazines and a trial judge) indicating that they are child pornographers are not credible sources."

Another really good book on the Day Care Cases is  Though this book is out of print, it should be available on Amazon.com.