No there isn't a book specificly on the Tunisian subspecies of Spur-thighed tortoise. There is one caresheet http://www.tortoisetrust.org/articles/tunisian.html
If you have any specific questions, I'm sure we could help.
thanks for the reply i have one male tortoise for 5 years and got the other two about 3 months ago my male keeps trying to mate with both male and female.dose anybody know what age they have to be before they can mate.
It's more size than age that determines if a tortoise is adult or not.
How big are your tortoises? Here's how to measure them http://tortoiseforum.org/thread-6948.html