Here you can find a list of pattern related books.
If you know a great pattern book please let me know.
Categories are
1. Places (European, Islamic, Arabic, Japanese, Chinese, Around the World)
2. Time (Historic, Art Nouveau, Art Deco, Twenties, Thirties, Fourties, Fifites, Sixties, Seventies, Abstract, Geometric, Modern, General, All Centuries)
3. Motifs (Natural)
4. Surfaces (Wallpaper, Textile)
5. How-to
6. Artists