From publisher blurb:
Compiled over the years by a pair of ageless (and tremendously charming) explorers, The Adventurer's Handbook is a collection of new and exciting abilities that every adventurer should get to know before the start of their next journey.
Here, we're proud to introduce 30 new general feats, including the outrageous hybrid skill feats: a new type of feat that requires and combines the functionality of two or more skills. With them, you can learn new combat tricks like calculated risk, evasive somersault, and unexpected maneuvers; master numerology with arithmancy, all in the numbers, and sacred geometry; or explore your more artistic side with powerful voice, enthralling artwork, and fashion master! A portion of proceeds will go to charity!