It's business as usual for Tavish McCaskill, a Canadian bookseller living in Geneva, until a strange customer comes to his shop with an even stranger book: an old Kabbalistic manuscript by a legendary rabbi that's supposedly been kept secret for five hundred years. At first, Tavish thinks it must be a forgery: why else would it include quantum equations that hadn't been developed until the 20th century? But closing this matter isn't as simple as...