This was the best sketchbook I ever owned. It appeared mysteriously and within a year, was gone to the wind. These are the back pages where I was exploring different water and alcohol marker brushes and ballpoint on the amazing vellum-like paper.
I'm surprised how when I use a sketchbook's back page basically to test media, I end up freed from the pressure to make anything "good" and as a result, the doodles that end up there sometimes tell their own story that I look back on much later and remember.
I bought a set of 3 Bic multi-color ballpoint pens, a total of 10 colors including black, and a new sketchbook. Playing around with what colors and effects are possible, I'm excited to do more stuff with these pens.
The colors didn't perfectly reproduce between the photo and JPEG compression. But I love how the upper left section is all done with the one dark blue, green, and red pen.