I initially misread the title's intent and will, I hope to nobody's irritation, answer that question instead of the precise one posed.
I did not digitize any books
I've written, but I have recently digitized (and, arguably, not quite finished yet) a Hungarian language "Language Arts" school textbook published in 1871. It is fascinating to see how language changes over time.
I am also in the early stages of trying to digitize the full and complete 1910 Lionel Giles translation of "The Art of War". The eBook I've uploaded already for testing on here is the unannotated edition. The project I am pursuing will ultimately newly typeset the full translation, complete with all the commentaries and annotations, along with all embedded Chinese Hanzi characters, along with whatever else that fabulously complex and thorough old book throws my way.