Do you realize that each of the three PDFs has the official metadata title of 'Chapter 5 - Magic'?
If all three PDFs are open in a reader that uses the metadata title and not the filename, it is pretty impossible to know what tab to open to find anything ;)
Also, the Monsters Compendium is a whopping 100+ mb for 64 pages. I managed to optimize my copy to about 10mb with little or no reduction in visual acuity.
I'll dip into editing and other feedback when I can get the time.