https://wccftech.com/how-to/vampire-the-masquerade-swansong-scene-7-how-to-solve-the-books-and-music-box-puzzles-with-leysha/

During Scene 7 of Vampire: The Masquerade - Swansong, Leysha goes to the Red Salon, Richard Dunham’s blood bar, hoping to find him and talk about her identity. However, this mission features two of the most challenging puzzles of the game, and they must be solved to complete the level. Let’s see how to do that.

To find the books and the music box puzzles, you need to access the basement of the Red Salon with a staff access card. Alternatively, if adequately leveled up, you can also use your Technology skills, but it will cost you some Willpower. The staff access card can be easily found on the bar counter, so there is no need to use your abilities.