They really are beautiful.

RHS Encyclopedia of Gardening (RHS) (Hardcover)
Hardcover: 760 pages
Publisher: Dorling Kindersley Publishers Ltd; 3rd Rev Ed edition (5 Sep 2007)
Language English
ISBN-10: 1405322276
ISBN-13: 978-1405322270
Got this as it was recommended as one of THE resources for the gardener, and those who suggested it were not wrong. Truly, awesome. Maybe THE ultimate garden reference book?

RHS Gardening Through the Year (Rhs) (Hardcover)
Hardcover: 384 pages
Publisher: Dorling Kindersley Publishers Ltd (3 Feb 2005)
Language English
ISBN-10: 1405308923
ISBN-13: 978-1405308922
Really is great for those if us who need reminding of what needs doing each month. Really lovely book.

Clematis for Small Spaces: 150 High-performance Plants for Patios, Decks, Balconies and Borders (Hardcover)
Hardcover: 272 pages
Publisher: Timber Press (15 Jan 2008)
Language English
ISBN-10: 0881928518
ISBN-13: 978-0881928518
As these are a love of mine, its only seemed right to get this :-)