To finish Chapter 7 in Call of Cthulhu, you need to open the safe in the Nameless Bookstore. Here are the detailed steps to follow:

1. Regain Control and Explore the Bookstore:
– After the reconstruction with the safe finishes and you regain control over your character, take the following steps:
– Approach the bookcase to the right from the safe.
– Between the books, you will find Drake’s Memories, which contain clues on how to open the safe.

2. Find Clues in the Bookstore:
– Return to the bookstore’s main room and go towards the last bookcase isle. You will find a board you can interact with; behind it, there are two new Drake’s Cylinders (2 and 3).
– Go to the small room located next to the bookstore entrance.
– Approach the stack of books by the window and investigate the Goblet.
– Check the chessboard set on the table and finally approach the phonograph.
– Listen to all recordings from the cylinders, as they include clues on how to open the safe:
– Cylinder 1: Regards the Goblet from this room. Indicates number 5.
– Cylinder 2: Regards chessboards on the table and the chess pieces defending the queen. Indicates number 3.
– Cylinder 3: Regards the books you can find on the counter and to the total amount. Indicates number 9.

3. Set the Right Combination:
– Now go to the safe and set the right combination: 5, 3, and 9.
– Accept your choice. This will activate a cutscene, after which the chapter ends.

4. Additional Steps for Clarity:
– If you need additional items or clues, you can explore other parts of the bookstore:
– Take the Diary of the pastor’s wife, Volume 4 lying on the pile of books.
– Find other books that increase Medicine and Occult levels, such as Breviary of Medicine, Tome III and Book of Dzyan.
– Investigate objects in the room behind the counter, including the painting and nearby objects, to ensure you have all necessary clues.

By following these steps, you will be able to open the safe and complete Chapter 7 in Call of Cthulhu.