The mages on the Isle have all been illustrated by Jason Rainville (who is also doing the map). Amos Orion Sterns is doing 109 monster pics, and Cynthia Sheppard is doing the cover.
Each of the mages will have unique powers (not tied to spell lists or the usual magic system), all of the monsters are new and unique. And everything's in color!
Depending how layout ends up as far as the page count, there will definitely be an index of monster listings (a bit challenging as none of the creatures has an actual name), but I'm hoping there's room to present all the monster stats as a mini "Monster Manual" style section for ease in poaching them for your home setting.
It will rock, this book.