Coaching Books???

I’m looking to find a few books that detail some coaching/motivation methods. My goal is to freshen up my training sessions, and work some more psychological angles with my athletes. Any suggestions for a particularly good book?? Thanks for the help.

Starting Strength.

Any of the sections of Fred Hatfield’s books on motivation.

I think there’s a few good articles on this site, too, for suggestions.

What age/skill group are you working with?