If anyone is looking for in-character reading material, there’s an online library of dime-novels here:
Next step: work out how to print and bind them. Though could you just send them to Lulu and get a POD copy? (though that wouldn’t get the proper, paper cover)
Edit to add: Lulu does a 6.88 x 4.25 “pocketbook” sized paperback, at a cost of US$2.45 for a hundred page book (plus postage from wherever). Its about a centimetre too tall, but it’d do if you wanted to go to the effort of making your own props. You could either live with a card cover, or chop it off and replace it with a proper paper one.