Personalized Book Lovers Gifts Unicorn Librarian T-Shirt. Unicorn sits on a stack of colorful books on this gift for a bookworm, librarian, book lover. Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.