My new coloring book

This coloring book looks at conic sections, Kepler's laws, the Oberth Effect, Hohmann Transfers, Tsiolkovsky's rocket equation and other stuff related to going to space. Coloring book is $2 plus shipping and handling.

I am not pleased with the page thickness in this book. A coloring book should have opaque pages so the image on the other side doesn't show through. Therefore I am making an effort to send a digitial PDF copy to those who order this book.

With the PDF a user can print pages to color.