The Darkroom Cookbook and (even better) The Film Development Cookbook. Steve Anchell is author of both (the film book has a co- author whose name I forget). I bought both last month from amazon.com.(posted 8911 days ago)I will have my PMK developer to try on Sunday at last (a friend is bringing it with him from Montana after getting it from Photographer's Formulary for me) but I plan on trying a bunch of different films to see how they work. I'll use XTOL or Rodinal for the films I like that don't work well in PMK, but from what I've read, almost any black and white film works alright in it. Supposedly slow films and t-grain films aren't as good but I've read a few articles from people that thought it worked great. If in doubt, try, I guess.