1. TAP 3 Books between lights on top

2. TAP 3 Books to activate

3. TAP left side of bottom shelf

4. TAP and SLIDE all red books to the right side

5. TAP and SLIDE and green books to the left side

100 Lights Level 42 Walkthrough
The Study 42
100 Lights Walkthrough

100 Lights Cheats
100 Lights Answers

100 Lights Level 43 Walkthrough
100 Lights Level 41 Walkthrough