A. It's certainly worth a try. Just contact those publishers and ask if they will reassign the rights to you. Most will, unless they have their own plans for reusing them. If they do release the rights, they will likely provide a credit line they will want you to include in the acknowledgments page of the book indicating they were the original publisher. You will also need to let the book publisher know that the pieces that appeared in newspapers are not under copyright and are in the public domain. The exception is if you asked the newspapers to carry your copyright notice on the pieces when they were published originally.