This is a hard one to answer. So many fantastic books have shaped my life in helpful ways, gripped my emotions, enriched my imagination and made my life richer & more enjoyable. Ask me tomorrow and this list will probably be different, but these five books have made a big impact on me in different ways. They are all very different from each other.
What's So Amazing About Grace (by Philip Yancey)
The Chronicles of Thomas Covenant the Unbeliever (by Stephen Donaldson)
Zen & The Art of Motorcycle Maintenance (by Robert Pirsig)
The Code of the Woosters (by P.G.Wodehouse)
Attachment in Psychotherapy (by David J Wallin)