Alcatraz versus the Evil Librarians

This is going to be one of those few reviews I write and there aren't any spoilers. For Christmas I was given Alcatraz versus the Evil Librarians by Brandon Sanderson. I have read several of Sanderson's books, but this is a difference genre. And it is bizarre! I don't even know how to express how annoying, frustrating, intelligent, captivating, original, and clever it was. I still don't know how I feel about it.
It is a preteen adventure book, Harry Potter started out as the same genre. I would also include the Percy Jackson series as well as the Septimus Heap books. They are all about 12 year old boys (who all act older) who find out something amazing about themselves aka they have some magical ability and then they go out and save the world.
The thing about Alcatraz though is that Sanderson breaks all the rules. It's in first person and it's filled with foreshadowing and fake foreshadowing like "Little did I know that I was going to get attacked by sharks next." and then he goes and doesn't get attacked by sharks. But he does get attacked. And at the beginning or sometimes the middle of each chapter he embarks on random tangents about the correct way of reading books (from the beginning), and how thought provoking books are all about boys and their dead dogs. Which are genuinely intelligent and funny. Those asides definitely remind me of older authors like Dickens or Louisa May Alcott except their asides were usually moralistic.
But I think what might have been most frustrating is that throughout the whole book Alcatraz is trying to convince us that he's not a nice person. But he's not. And it gets annoying.
But the characters are interesting and well developed. The magic is original and complex. The plot is clever, and the voice is brilliant. I'm not surprised Sanderson wrote it. But I don't think I've ever read a book that was so purposefully irritating.
And I apologize, if you haven't read the book, this will probably not really make sense.