Books that you can find for pennies, or for the price of a modern paperback, or Hardcover, or even far less?
I've discovered my Niche, in the past year, as a Bookcrosser, having already discovered some 1950's/60's era books that I gave a 2nd life to.
Yesterday this calling was re-confirmed with a visit to a used Bookstore, in the city of my youth, where I bought 9 hardcovers for $7:
I have not registered the books yet ( As is my usual, each will have a photo, if needed. ), but here are the publication dates of 5 of them:
No, your eyes are not deceiving you.... 1896. ;-D
With that last one it will truly be one last go round, due to its condition, but the Old Warhorse is still hanging together, though barely, and deserves the respect of my cooking up something SPECIAL.
The fun in finding books to Release this way also comes from what you might find written inside the cover, and/or on a page, and especially if some item was left inside the book.
Journal your discovery, and make sure that extra item/items stays with the book, at least for your Release.