For those with Kindles, Nooks, and other eReaders, some wonderful old books are now coming out in digital format. The digital evolution has turned reading into a foray into Aladdin's Cave of Wonders from the number of new and old treasures that can be found.
Historical Romance: The Grande Dame of them all, GRAUSTARK, which is from the turn of the last century and ranked with PRISONER OF ZENDA and the SCARLETT PIMPERNEL. Graustark became an adjective during the 1920s for any romance with the improbable elements of Princess, Commoner, and some mythical kingdom in the middle of the Balkans.
Historical Fiction: Elswyth Thane's WILLIAMSBURG novels (seven books in a family saga that follow a Virginia family from the Colonial era to England in WWII) are slowly making their way into the eBook realm (don't be misled by the covers on the eBooks, they are atrocious and do not reflect the very real charm of these books).
Also, contemporary (at least to their times 1920s - 1950s) novelists like Nevil Shute and James Hilton are in eBook format and, if you've never had the pleasure of reading their books, I strongly recommend that you treat yourself.
I just finished reading the HORATIO HORNBLOWER series (something my father loved and I never got around to reading it) and enjoyed it immensely. If you are interested in Historical Fiction (Napoleonic era/British Navy), this is great read.