Depends how fast the chaos starts. Did you realise that a lot of looters and clones of me would be running around from the stores, looting anything useful? Plus the factor, how fast did you realise it would start? What if there is no announcement and suddenly a zombie is banging on your door?
It would also be a very expensive plan, all these books won't rain from the sky! Though mobbing a bookstore dressed as zombies, handing out flyers advertising TZH and leaving a sample album to the employees would be both cheaper and sufficiently close to legal not to get in trouble.
It is legal because we won't be hurting anybody or directly causing a public disturbence, we will also be using my favourite superpower to raid the bookstores without actually touching people (Assault Charges), the power of intimidation!
I've got an Idea we could Mob bookstores dressed as zombies for publicity and then we could (while bookstore owners are running for their lives ) run inside and replace a large section of books with TZH books. Then we could do that to bookstores around the world. GLOBAL RIOTS