A while ago I bought one of the Mercedes Classic CDs with electronic versions of the BBB. It cost about $50 and included the '59-'67 BBB plus the '67 onward edition. It's set up to use a browser to view it, but right from the get go I had trouble with it. It's wouldn't work correctly running directly from the CD. For some inexplicable reason, when I copied the CD to my HDD, it started working correctly. Regardless, I found the browsing tedious, and quite frankly difficult to find what I was looking for.
So, I retooled it into a giant PDF. All the BB contents are already PDFs on the CD, so that formed the starting point. Now I have a searchable BBB, laid out exactly like the printed version, with a table of contents with hot links to each section. To me, this is SO much more useful than the CD, and more useful than the printed version. I can print out a section, take it to my shop, trash it, and not care. With full search capability, you can just search for "throttle" and find every occurrence of that term in the BBB.
If anyone else wants to do this, here are the steps. It's a bit time consuming, but the results are very satisfying. To do it, you will need a full version of Acrobat, not just the reader.
1) Find the version of the BBB that you want to process and merger all the individual PDFs into one big PDF. Be sure you assemble them in the correct order.
2) Run the OCR function on the merged document. The original PDFs are just scans of the printed BBB and hence unsearchable without running OCR on it. This will take a LONG time. I don't remember exactly, but I think it took around 6 hours to run.
3) Next make a table of contents. I used word, then saved it as a PDF
4) Merge the table of contents into the main BBB pdf
5) Create links from the TOC entries to each section in the BBB.