A few of my go-to genealogy books (non-affiliate links):

The Family Tree Problem Solver (Revised 1st Edition), 2011, Marsha Hoffman Rising, CG, FASG

Evidence Explained: History Sources from Artifacts to Cyberspace, 3^rd edition (Revised), 2017, Elizabeth Shown Mills, CG, FASG, ed.

The Researcher’s Guide to American Genealogy, 4^th edition , 2017, Val Greenwood

Genetic Genealogy

Advanced Genetic Genealogy: Techniques and Case Studies , 2019, by Debbie Parker Wayne

Genetic Genealogy in Practice, 2016, Blaine Bettinger and Debbie Parker Wayne

Writing it all Up

Mastering Genealogical Documentation , 2017, Thomas W. Jones

Mastering Genealogical Proof, 2013, Thomas W. Jones

Specialty

A Brief History of Everyone who Ever Lived: The Human Story Retold Through our Genes, paperback edition, 2018, Adam Rutherford

Raking the Ashes: Genealogical Strategies for pre-1906 San Francisco Research, 2^nd edition , 2012, Nancy Simons Peterson

Tracing Your Irish Ancestors: The Complete Guide, 4th edition , 2012, John Grenham

The Family Tree Italian Genealogy Guide: How to Trace Your Family Tree in Italy, 2017, Melanie D. Holtz

What about you?  Any favorites not on this list?  Anyone know of some good German ancestry books?  Or Danish ancestry, for that matter?