Book Sox 
Stretchable fabric book covers for hard-covered books.
http://booksox.com/Gotcha Covered
Handcrafted cloth book covers.
http://www.clothbookcovers.com/
BookWrapz
Stretchable book covers for all sized textbooks.
http://www.bookwrapz.com/
Stretch Text
Stretch fabric book covers that are reusable and washable in a wide array of designs.
http://www.stretchtext.com/
