Not many authors risk putting out current works as pdf for obvious reasons. (I published something in pdf form with a password, only to find that some helpful colleague had managed to convert it to a Word document and had then altered it!)
Much of the 'Collecting B&O' content is covered by the Beocentral website, and although it's not as easy to read as a book, with Beoworld, it gives you all you need (assuming you can get an online connection.) You could save webpages for later reading without an online connection.
Graham
I used to be indecisive, now I'm not so sure. [W C Fields]