As well as the books, the film and the e-novellas there is:
Reacher's Rules: Life Lessons From Jack Reacher
"Prefaced" by Lee Child and published in November.
My name is Jack Reacher. No middle name, no address.
I've got a rule. People mess with me at their own risk.
Rule 1. If in doubt drink coffee
Rule 2. Never volunteer for anything. Soldier's basic rule.
Rule 3. Don't break the furniture
Rule 4. Only have one woman at a time
Rule 5. Be on your feet and ready
Rule 6. Show them what they're messing with
*Hand-to-hand combat * Travelling light * Cracking codes *Handling weapons * Conquering your deepest fears * Understanding women