I want to write an ebook about back pain And I want to use images such as this, which can be found in the grow taller 4 idiots ebook: http://www.heightgrowth.com/images/grow_taller_exercise.jpg http://www.growtaller.net/images/ExerciseSample4.gif http://www.growtaller.net/images/ExerciseSample1.gif Where can I get a license to this type of images?
I would check all the big microstock sites first (Shutterstock, Dreamstime, Istock, etc). If you can't find anything there, you could probably find an eager illustrator who could create these illustrations for you. If you don't have any money to spend, you could take a picture of some friends doing these exercises, then trace the photos in Adobe Illustrator (or any other vector program).