Todd Wilkins, baby!
I loveddddd Sweet Valley! I started reading the Kids, then the Twins, then SVH. (Actually, I tried to read the SVH ones when I was a little too young and my mom was like uh, no more for you, after I spent like three hours crying because Elizabeth got into a motorcycle accident and was in a coma. "Dear Sister," for anyone who cares; quite gripping. Ha.)
The funny thing is, I was so into Sweet Valley that my godmother bought me a BSC book and told me if I'd at least read it, she'd buy me another book. Turns out I loved BSC just as much, if not more, so I got another one of those.