I read the paperback, but it weighs a ton. The book's heavy figuratively and literally. Thank goodness for IPADs. At first I was worried this book might be too scholarly. I'm more a fiction reader. But I was pleasantly surprised by how quickly I got into the story. The Brontes were a normal dysfunctional family and that explains why Charlotte had to create her alter egos. She was clever, we knew that but turns out she could figure out anagrams in her head. Without Carter solving these puzzles we'd still be thinking her sisters were authors. A really interesting book.