I usually buy these books about the technical aspects of photography when I see them at the flea market or at used books stands. They were written in socialist times (the ones I have are from the fifties till early eighties) and they were intended for amateurs. They are quite useful. Actually I have learned how to use a SLR camera and to process my films reading one of these books, in the early nineties when I was a bored art student learning photography by myself. I still use that book when I check for proportions and time in processing my films. They do have though many times, besides charmingly dated naive jokes, a patronizing tone. And of course the reader, the photography enthusiast who is addressed in these books, is always male both in the text of the books and in the illustrations also (even if it is only a naked little boy on the beach, photographing the sea).
The rest of the books I have are from Romanian authors.
Linking up with Vintage Bliss Tuesday.