I'm also a happy user of SSL Labs and reader of Bulletproof SSL and TLS. One very cool thing about the book is that if you purchase the hard copy (I got it from Amazon, for example), they'll email you epub, PDF, and web versions for free. The web version is perfect for reference at work. And the book gets updates too (http://blog.ivanristic.com/2015/08/bulletproof-maintenance.h...).
Thanks Ivan!