Perma-Bound® has been a leader in the book rebinding industry of reinforced paperback books for over 60 years carrying an unconditional guarantee. Perma-Bound® Books are known nationwide by Schools and Libraries as having, "the strongest books you can buy." TLS™ offers a large selection of Perma-Bound® book sets including: middle grade, teen, graphic novels, level readers, chapter books, and more!