If you like me that reads a lot of book series, and finding hard to keep up to new releases.
https://eudemon.org/ is exactly what you need, the service is currently in Beta, and will offer free email, browser and mobile notifications. Reading list, and other interactive activities based on book data is planned.
I often save the book list in my computer drive and refer to it, selecting each one of them and searching online to see if they have new release, as you can imagine, a very time consuming process. A web app like this is complete life savor for book lovers, check it out!