Public bookshelves are an interesting concept. The link is to the article in the San Francisco Chronicle. I have noticed in the local Perkins and sometimes in the local grocery store, shelves that are available to leave books for others to read. Years and years ago, I set up a book swap in a store I owned with hopes of encouraging reading. This was in the late 70s. It never took off, now things like Book Crossing seem to do well. Frankly anything that gets people to read is probably worth trying.
Particularly if they are reading books I have written. LOL go to www. bentrim.info for links to my books. ( I couldn't help myself.)