Warning - Spoilers Ahead
" Stage 3 | Locking up the Books" video will spoil the inner workings of the puzzles,
but due to the way most of the puzzles are presented to you, spoiling can actually be avoided
so long as you don't memorize the inner mechanics by heart.

The Assembly Videos will show you how best to put your book together, but you do need to watch carefully follow along and pay close attention to the orientation of various pieces and magnets in order for your book to work correctly. Before attaching and locking up any of the pages together, make sure you can still unlock the page with your intended solution.