Reading the Codex Silenda book is gonna be a chore. Not only because each page is a puzzle that requires solving before moving to the next page but also finding an available copy looks impossible...for now. The Codex Silenda has a Kickstarter project but all 400 units that were available have been snatched up. It might just be a waiting game for those of us that missed the opportunity. Once you actually get your hands on this book you'll find that it's a five page book that includes one intricate puzzle for each page. The book does feature a story of an apprentice in Da Vinci's workshop. The story unfolds as you unlock each puzzle and move deeper into the book.
