By Arthur A. Chadwick and Arthur E. Chadwick
Timber Press Incorporated, 2006.
Description from Amazon.com
Cattleyas, first introduced in 1818, are the flowers whose form and color defined the essence of tropical orchids for generations to come. This helpful and informative book-for veteran orchid enthusiasts and beginners alike-describes each classic Cattleya species in fascinating detail and includes all that is required to appreciate and grow cattleyas successfully.
I have found this book to be wonderfully useful and informative for growing my Cattleyas!!
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You Can Grow Cattleya Orchids 
By Mary Noble
Mcquerry Orchid Books; 2 edition (1997)
I have not read this book but it looks like a good book for beginners.
