From what I know, this is an officially licensed 1985 Super Mario Bros. choose-your-own-adventure book from Japan. I've found more images of the book. After seeing the X post, I have decided to search it up and I found 5 more images.
Click or press space to see more images. Images in order: 1. A spiked Goomba variant 2. Princess Peach 3. A rock Goomba variant 4. A Bowser variant with different hair 5. A minigame or something? Peach and Toad are seen on another page.
