I remember a trilogy of YA books I read as a kid, but I can't remember the name. Here are a few details, maybe they'll strike a chord with someone here.
They were written sometime in the 90s.
It was about a group of geniuses who all moved to an island to work on something. The protagonists were the children of the geniuses, and were even more brilliant than their parents.
The protagonists made a supercomputer called either Sherlock or Watson. Probably Sherlock, since it's supposed to be superbrilliant. It had an accent, I think. This supercomputer was sometimes referred to as the most powerful computer in the world.
Either the first or second book had a big red robot on the cover. Or maybe the cover was red and the robot wasn't.
I think another book had a shark on the cover. I think this cover was yellow-themed.
One of the adults was a traitor or villain of some sort. His (or her) identity was kept ambiguous for a while, and only revealed at the end of the third book.
I remember one line about how their watches were powered by the heat from their skin, not batteries. This was pretty weird at the time.
It ended with their supercomputer somehow becoming sentient and helping save the day.