Some great Horology books

Breitling

The history of a great brand of watches 1884 to present. By Benno Richter. An excellent guide to old Breitlings. A Shiffer Book for Collectors.

A Time Capsule

A Time Capsule, Omega Speedmaster, by Kesaharu Imai. A very hard to find guide to the iconic watch. Full of incredible research and images.

Navitimer Story

From Watchprint.com. An excellent guide to one of the most emblematic of chronographs. Essential reading.

Retro Watches

Beautiul imagery and great descriptions of some  definitely non-mainstream watches. Some incredible watches came off the design board in the past.

A Man & His Watch

Numerous interviews by watch writer, Matt Hranek, about the watches that mean most to them - each one a great story.

A Concise Guide to Military Watches

Essential reading for this niche subject.