The Patrick Walsh book is an excellent overall guide.

If you end up doing radiation and need Androgen Deprivation Therapy I'd also recommend "Androgen Deprivation Therapy: An Essential Guide for Prostate Cancer Patients and Their Loved Ones" by Richard Wassersug and others.

If you're sexually active I'd recommend "Saving Your Sex Life: A Guide for Men with Prostate Cancer" by Dr. John Mulhall. It's slightly dated but still has lots of useful information.

The Zero Prostate Cancer web site also has a bunch of PDF documents containing questions that everyone should ask their doctor: https://zerocancer.org/about-prostate-cancer/questions-for-your-doctor