I am friends with just one (of several), and he is fantastic, and I am lucky to call him a friend. Now, if he wrote a book, I would absolutely want to buy it and think nothing of picking up a copy—certainly not that it’s creepy. However if there are still odds and ends and if he is still interested, common sense would dictate that he tell me about the book in the first place. Right? Wouldn’t I have known for a while that he was even writing it?
So why did this guy not tell you about the book? And, with that knowledge withheld, are you sure you can call him a friend? His reticence is all that’s creepy about this situation, and there are too many good books in this world to waste your time with his if you (and he) have misgivings about it.