Although Nathan is seemingly too lazy/idiotic (I am giving him the benefit of the doubt here) to sign up yet - this looks like a good book for his central study next year.
http://www.amazon.co.uk/Smile-Mind-Thinking-Graphic-Design/dp/0714838128/ref=cm_lmf_tit_17_rsrrrr0
http://www.amazon.co.uk/Smile-Mind-Thinking-Graphic-Design/dp/0714838128/ref=cm_lmf_tit_17_rsrrrr0