The Sketchbook labeled 1 is the book starting in May of 2007.
There were many sketchbooks before 1.
My drawing before then was so uneven and clumsy that whenever the stack got too big I would cut out the 'good' pages and eliminate the rest.
Later, I took to clamping them and cutting the spine off with a circular saw then putting the pages into an auto-feed scanner.

Sketchbook 1 was different. It marked the beginning of my psychedelic adventures and with that came some pretty radical shifts in the quality and meaning of my art. Not to say my work prior to that was bad. Relative to my skill level, some of my early stuff was interesting, but 1 was a change in attitude and approach. I began doing much more careful and structured study and really trying to break down and understand what I did and didn't know and how I could get the kind of versatility and quality that I desired. ... I'm still a long way from there, but I'm making progress.

It's 8 years later. I'm moving more and more towards smaller sketchbooks and working on a tablet. Sketchbook 19 won't be the last of it's kind. It is nearly full and 20 already sits blank, ready to be worked in. 19 is neat though. In sketchbooks prior to 1, I would find maybe two or three drawings in the entire book that I felt were interesting or had elements that I felt were good. In 1 there were dozens. 19 has many hundreds.

I am scanning it in part because I wanted to show what I am doing lately (vs the coloring project I've been working on this summer, which is still back in Sketchbook 2) and in part because I've met so many people who say 'I wish I could draw but I haven't any talent'. Maybe some artists are born skill. Most of the ones I know have spent years studying and worked hard to hone their craft. No different from musicians practicing scales and progressions. If you want to learn to draw, just start trying to do it. Scribble, doodle, trace things, Set up some simple objects where they won't get knocked over and draw them. Draw things sitting on your desk, draw copies of art you like. Pick up a book and read what others have written Betty Edwards' 'Drawing from the Right Side of the Brain' and Kit LaBourne's 'The Animation Book' are personal favorites.

I know. I'm not the world's greatest artist. Who am I to give advice? HINT: There is no world's greatest artist. Look at XKCD or The Oatmeal. You don't really need to be Van Gogh to express yourself. Pick up your pen and believe in yourself. That and a few thousand hours of practice are all you need.