Two random ideas, but I would totally be up for the challenge!
Power of Observation (Not Stalking!)
A book about how much we can learn from people and the world by just taking your time to observe, open-mindfully.
How not to suck (At Writing Music).
A book on ideas that can different you from other mainstream singers. It will also give you advice on composition and ways to connect to your audience.
Rocket's [Insert Here]. 