I just realized that several guys have apparently just logged on to their PayPal accounts and sent me money... i.e., without going through the Online Store on this website. If that's the case, then Mark (who is doing the shipping) never got a copy of the e-receipt, and thus didn't ship your book.
So if that applies to you... I'll comb back through all the receipts and forward them to Mark, and we'll get it sorted next week and ship your book.
If you ordered normally through the Online Store on this website... No worries.