To to learn more about the Kama sutra, it's history and positions, please click through my recommended links below:

http://www.exoticindiaart.com/article/kama_sutra/

Online photo gallery : http://www.thekamasutra.co/a-z

Entire texts in ebook format: https://www.gutenberg.org/files/27827/27827-h/27827-h.htm