5 Billion Martha, Select Comics Volume 11, by Harumi Sato. - Title: 5 Billion Martha - Series Name: Select Comics - Volume: 11 - Author: Harumi Sato Thank you for viewing. This is an old book, but I was interested in Ryokuhabato and bought it used and cherished it. I had a hard time finding it back then, and it was also expensive. It's a very old manga, so as you can see in the photos, there is yellowing and staining throughout. The book is very interesting. It will be shipped via Nekopos.