“Yo dawg,” the Pimp My Ride meme would start, “I heard you like Macs and books, so we put your MacBook inside a fake book so you can look like you’re carrying a crazy big book around!” That’s the pitch, essentially, behind TwelveSouth’s $80 BookBook, which uses a deliberately aged leather hardbound book as a facade for a zippered carrying case. The spine says “Book Book,” and “Vol. XII,”…