I have received this pdf by purchasing the print + pdf bundle for an extra $10 from Kobold Press' website. Here are my first impressions of the pdf as I await my printed copy.
This 110 pages file (104 of which are actual content) is packed full of flavorful creatures statted for the 13th Age RPG. Most entries contain a handful of variants, at least one of which is well-illustrated. Lists of carried items and adventure hooks are also provided along with the usual background and description. The association of some new magic items with many of the creatures is an interesting approach. Additional PC races are also offered although the treatment given to some of them is somewhat brief. The book then closes with Icons linked to the Midgard campaign setting and proposed as substitutes to those in the core book.
All in all, the new creatures, magic items, PC races, and Icons contained within can be ported to any game and make for a worthwhile supplement to the 13th Age line even if Midgard is not used as a campaign setting.
[4 of 5 Stars!]