You can find a lot of info in an article (volume 2 issue 3) wich you can download at www.podarcis.nl. You only have to register, the download is free.

I'm keeping H. laevis for several years, and they are easy and hardy animals. It's also fairly easy to breed them.

Recently a book apeared from the same author (M. Kroniger) about H. laevis. The problem is it's only available in german.

Good luck.