When I got my first eBook “Reader,” a Sony PRS-700, in 2008, I went stumbling around for books. One of the things I stumbled on was an archive of the 180+ Doc Savage books, in .lrf format, for the Sony Reader series. (yes, I am aware that they were not “legal” to download, so if you are offended you can move away now). The .lrf format worked great on the old Sony reader...
Doc Savage eBook Fun
D