The image is first published in Wikimedia and it is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
You should IMHO put the image in the credits and add the CC notice to your book and provide a link to a place you control where the (possibly modified) image is available too in a proper modifiable format.
This may go above and beyond some of the CC requirements but that should cover it.
From the CC-BY-SA text:
This Section 4(a) applies to the Work as incorporated in a Collection, but this does not require the Collection apart from the Work itself to be made subject to the terms of this License.
I would consider your book to be a collection of your work +
My take is that the Share Alike clause only applies to to that image, not your book as a whole. But I am not a lawyer!