Some of these lessons have references to lessons that are yet to be written. If you've found these lessons useful and would like to them continue, you should send a message to the author and express your thanks. If they know that their work is appreciated, the better the chance that additional lessons will be written.
NOTE:If you plan on printing these lessons out, be careful. These are plain text files. Before you print, you might want to open the files in your favorite word processor and make sure that the page breaks do not occur in the middle of some TAB or fretboard diagrams. Otherwise, you might have a hard time following along. Also be sure to use a fixed space font (like Courier) or else the TAB will be difficult to read.
If you want to get all of these lessons in one shot, download bass-lessons.tar.gz (50K), bass-les.zip (51K), or bass-lessons.sit.hqx (85K). All lessons on this page are included.
You may also want to check out the lessons on the guitar page - some of the lessons there cover theory that could still be useful to you