Look at a book.
Choose 2-5 physical books from the same genre as your book.
What would it be shelved by?
If you don’t own these books try the local library or browse a bookshop.
Look at their binding. Are they hardcover, softcover, spiral bound?
What size are they?
Are they illustrated?
Are the pages blank ink or full color?
What is the paper texture?
Are they designed to be written in?
Which would you prefer for your book?