Extract from an article by Helen Sedwick on Book Works Site:
It’s unlikely that you’ll be thinking about estate planning as you launch your literary creations into the world. But if your books are successful, your characters may live forever alongside Elizabeth Bennet, David Copperfield, and Frankenstein.
The copyright in your books also lives on. Under current law, a copyright lasts for the creator’s lifetime plus 70 years. So if you publish a book in 2016 and live another 40 years, the copyright will last until 2126. That’s 110 years!
Something to think about. And plan for.