For those of you looking for a collection of high-CR monsters, there's not a whole lot out there. Quirin's Mythology #1 delivers a number of epic creatures, suitable for a variety of levels.
Overall the creatures are well-designed and interesting. The creature ideas are compelling, though the mechanics are unexceptional. (Needless to say, the skills aren't correct -- in fact, skill points are assigned almost at random.)
Alcorn is an interesting unique monster; Deshayvine are thumb-tall feyfolk warriors with a twisted background; Gomthu are corrupting demons; the Milmang is a unique creature with incredible power, sapping the strength of even gods when it hits; Threyclops are epic giants.
The text expands on these by adding variants (Deshayvine assassin, Threyclops fighter), custom magic items, and a new spell.
Highlight: creative backstories for all creatures
Recommended to: everyone who runs epic campaigns, nonepic DMs looking for background material<br><br><b>LIKED</b>: The creatures all have interesting backgrounds and the material is well fleshed-out.<br><br><b>DISLIKED</b>: I didn't like the format of the product so much, or the mechanics of the creatures.<br><br><b>QUALITY</b>: Very Good<br><br><b>VALUE</b>: Satisfied<br>
[4 of 5 Stars!]