Oh, they're real!
Hey, Dave!
You'll notice I linked to amazon.com for each of them. I know how bizarre the titles sound. :D
According to the back flap of the dust jacket of Nunga-Nungas, Louise Rennison is a comedy writer for various performers on British TV.
These books are literally laugh-out-loud looks into the lives of 14-year-old girls.
Sex God was originally published in GB under the title, It's OK, I'm Wearing Really Big Knickers, but the American publisher changed it because, to us, "knickers" are the short pants most closely associated with the mental picture of Little Lord Fauntleroy, and not feminine undergarments.
Regards--
Mary Anne