Just a few books I have found very helpful and inspirational:
Wildwood a journey through trees by Roger Deakin (ISBN 978-0-241-14184-7) a passionate and informative book about the wonderment and diversity of trees and woodland around the world.
The Woodland Way by Ben Law (ISBN 1-85623-009-0) An excellent book on the permaculture approach to sustainable woodland management
Trees and woodland in the British landscape by Oliver Rackham (ISBN 1-84212-469-2) The complete history of Britain`s trees, woods and hedgerows-essential reference book
Green Woodwork by Mike Abbott (ISBN 0-946819-18-1 )A classic on working with wood.