I just joined MobileRead and already I learned something new--I had no idea you could buy Kindle books in "bundles!"
FYI, if you use
KindleIQ, put bundle in the keyword search box, and select "exclude public domain" in the drop-down menu, it currently comes up with 236 results. (Some are books which happen to have "bundle" in the title, though.)
I have a related question--beyond what's available in bundles, I'd be happy enough to find more modern (non-public domain) series where every title is available for Kindle. I've only found a few so far--such as Jo Dereske's Miss Zukas series thus far (one more is due out later this year), and C. R. Corwin's Morgue Mama series, off the top of my head. Anybody have others they are aware of?