I bought the OGL Monster Compendium: Egyptian because I'm a huge fan of Egyptian mythology. Unfortunately, this PDF is too lazy of a product to hold my interest, though it does EXACTLY what it says on the tin.
OGL MC: Egyptian is a compilation of various monsters from assorted OGL sources, including Testament and Hamanaptura (from Green Ronin), Bastion Press' deities books, and the D20 Fantasy SRD, among others. While having all these monsters in one place is convenient, no additional work or effort has been put into this PDF other than copy and pasting over stat blocks.
These various monster statblocks were all released at various points long the 3.5 OGL life cycle, and several were from products released before the 3.5 revision, and are designed for 3rd edition D&D. This means power levels and mechanics are wonky at best. No effort was made to clean up the stat blocks or convert the creatures over to Pathfinder- had the publisher put forth that much effort I would have been satisfied. Had the publisher included a few short (50 word or less) adventure hooks at the end of each monster stat block I would have been satisfied. had the publisher purchased cool new art or used appropriate stock art, to give me a well illustrated book, I would have enjoyed this PDF.
Xandegar's Adventure Realm did NONE of these things. So instead of being satisfied with this PDF, I feel like my pocket just got picked to the tune of $10.37. Avoid this book.