Hit and miss.

Hit: The Anxiety & Phobia Handbook (middle chapters) was excellent. I worked through those chapters in great detail and found what I learned hugely helpful.

Miss: The Mindful Way Through Depression. He recommended this when he got into his mindfulness phase. I detest mindfulness and this book did not change my viewpoint. It is probably a good book for those that find mindfulness useful. I'm just not one of those people.

He and I have very similar tastes in pleasure reading material. Those were almost always hits both ways. We kind of had a two person book club going.