|A detailed tome containing generations of archery secrets and techniques. Its pages are worn from time but mostly readable. A bookmarked page towards the back reveals how to steer an arrow even after it's been loosed.|
— In-game description[src]
It is a green and blue book with metal corners and lock on the right side. On the front is a metal shield with three metal arrows behind it.
The Archer's Handbook is located at the north of the map. Enter the castle, then turn left and use the Archer Costume to shoot an arrow and cross the water. Then, switch to the Sabertooth Costume and pounce to the dummy to the north. This will open a Sabertooth Costume door. You now have 60 seconds to get the treasure back to the safe house.
- According to its description, despite being an optional treasure, the Archer's Handbook is what allows Sly Cooper to control arrows after firing them while using the Archer Costume.
|Sly Cooper: Thieves in Time treasure|