The 4th book in a series of sci fi novels - [link]
This image is not available for use by anyone else.
The image is a wrap-around cover, the front is on the right, the spine in the middle, the back cover to the left.
The image was completed over a few weeks, on and off, so I am guessing a few days full time work.
All painted from scratch in Photoshop CS5. The author provided a photograph of the woman, which I painted over. The photograph was purchased here on shutterstock - [link]