Another quick monster feature from the Blackdirge with art by Jesse Mohn. If you've seen previous work in the Bestiary series, you know what you're in for. Several monsters with solid line illustrations.
This book makes an excellent companion to the Cthulhu mythos 4e book as it focuses on the monstrous entities that are from the Far Realm. Challenge ratings go from level 24, 18, 4, 9, and 13 over eight pages.
These creatures are done in a standard format with brief bits about the creature followed by lorealways a dungeoneering check in this case. Also included are tactics and encounter groups. This makes it easier to run the creatures with your own group of monsters or just use the listed encounter as is.
While its easy to go with the highest level creature as a favorite and a near campaign ender, the chaos kraken is a little too standard in its motives of using energies from the Far Realm on others to see what happens. It's a solid standard and it can be used as a method of introducing various new monsters as well as having the creature doing this in service to an even greater beast. But it's a rarity type of thing.
No, my monster pick for this book would be the Grethling. At a lowly level 4, it's found almost everywhere adventurers go, dark caverns and ancient runes, and has an interesting method of attacking the face. For its ease of use, it gets the thumbs up.
At $1.49, its hard to think of why someone wouldn't want to add Aberrant Horrors to their 4e games.