I like Your Money or Your Life by Joe Dominguez and Vicki Robin - very thought provoking book which I highly recommend.
Ive just finished Rich Dad, Poor Dad. Was awkward to read, and didnt really have anything new to teach me, but I dont regret taking the few hours to read it as its spurred me on a bit
In last 2 days Ive started reading the Millionaire Next Door and Tim Ferris' 4 hour work week (ok, so thats not technically finance) so cant comment on them yet, but certainly are extremely highly recommended.
What books do you recommend?