Simple, wonderfully written and fully realized, the Megadungeon Delver's Players Options book contains feats aplenty for the adventurer delving into the epic dungeons and cavern complexes. Highly recommended.
As the first in a series, this book leads the way with a bang. The supplement, like its core setting, uses a mix of fictional and factual personages to create a fully realized addition to an already incredible gaming world.
Pretty good and fairly encompassing take on the Durulz and the few related birdfolk of MRQs take on Glorantha marred in some cases by attrocious art. Solid and useful supplement if you have any of the flightless wonders in your RQ game though.