I collect 'old books' as a hobby so I have several 'beekeeping titles' that I really enjoy; But-MBs "The Practical Beekeeper" is still one of my favorites, despite not being old at all.
If you can find it, Richard Taylor's "How to do it Beekeeping" is another (long out of print). IMO; No Beekeeper should be without at least one copy/version of ABC XYZ of Beekeeping (I've got one from 1908 and one from 2008….both are very cool…very interesting, informative, and not quite as contradictory as one might expect).
All of them seem to bring me back to "The Practical Beekeeper" though……..for its practicality
Before its publishing I'd already printed most of it from MB's generous website, but purchased my own copy as soon as it was released (I have a habit of writing in the columns and underlining important passages in text books)…... …..just wish it had an index sometimes