AereA
28 Achievements
Steam
Repetoire
Collect all shop books
2.7%
How to unlock the Repetoire achievement in AereA - Definitive Guide
Shop books are scattered around the world of AereA, and are quite obvious to spot. They have a glowing aura around them, and are quite large (as big as your character). You will find a bunch in the music hall (the starting area), and one or more in nearly each of the different levels, including the boss hubs. None of them are missable since you can return to every area via the airship. Most of the levels are fairly small, but the two snow levels are by far the biggest and most confusing, so if you're missing any books after completing the game, I would start your search there.