A simple small book stand to hold a book in a 15° angle . The stands width is 14mm by default, scale it accordingly to the book you are printing it for. Unless you have godlike cooling, this model will require support. I printed with support enabled and it came out fine.

UPDATE:

fixed the model, previously one of the legs was hovering 0.185mm off the ground.

UPDATE2:

Added a Larger 18mm model for thicker books.