I’ve actually lost count over the years as to how many prayer books I have, as I have many small ones that you could consider “pocket prayer books,” that are small enough that you could fit them into a purse for a lady or into a pocket for a gentleman.
I also have some of the small ones that are what you could call Novena booklets that tell a story about a particular saint, and then have prayers for that saint. I picked those up at a Catholic book store/church book store.
Then I have some that were given to me as a gift, too. Those are what I would call the more traditional ones, like “The New St. Joseph’s People’s Prayer Book,” for example.