Books are Weapons - Embroidered Patch
The book lover's ideal patch for warding people off when you're in your reading bubble and must not be disturbed! Sew it onto your favourite cosy cardigan, t-shirt pocket or slouchy sweater, and make a wonderful nerdy statement!
(The advantage of sewing is that you can remove the patch whenever, like when you have to give away old clothes but you still want the patch. Plus no risk of glue peeling off like in some iron-on patches.)