The first is The Essential Cat Encyclopedia of Cat Breeds by Angela Rixon.
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We bought this book from Borders at $15.95 as a bargain book.
The second book is Essential Cat by Caroline Davis.
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This book has much more cat care information within than the first. There is good information on cat first aid, integrating a second cat into your household, the differences between kitten and adult cat care, and a good description on the common health problems in cats. The information is easy to read and there are good pictures.
The edition we own is no longer in print, shown here is another edition by a different publisher.
We bought this book from Popular at $15.90 as a bargain book.
We like to browse online as well. Apart from using Google to search for topics on cats, an evergreen site we like to refer to is Petfoodratings.net