from the cover:
Monsters for Classic Fantasy Role-playing Games involving underground complexes and large flying reptiles collected from the blog What a Horrible Night to Have a Curse...
designer's blog announcement:
Within its twenty five pages (counting the cover), you'll find all 52 of my Beast of the Week entries, plus twenty more critters that appeared on the blog in the past. That's right, 72 new(ish) monsters for your old school gaming pleasure! Stats are in BECMI format, but I'm sure that if you're playing an OSR game, or even 3/4E/PF, you'll be able to manage any conversions necessary to your game of choice.