It’s done! I’ve written and published an iPhone app for Sci-Fi fans. Check it out on iTunes: https://itunes.apple.com/us/app/id628452917
On the surface, the app contains standard book/reading library functionality. It lets you keep lists of books you have read, would like to read, and are reading. It provides a title search and pulls book detail information (i.e. cover photo, description, etc.). It also provides a barcode scanner for adding your existing books to the handheld library. You can rate books you love, and track those which you own.
The app becomes more specific to fans of Science Fiction by including a recommended reading lists. Currently, it provides lists Nebula, Hugo, and World Fantasy award winners. You can browse these lists to find your next read, and track your progress working through these lists. I plan to add more lists with future releases.
I wrote the app with myself in mind as a customer, and believe I’ve nailed everything I would look for. If you have time to try it out, please let me know what you think.