I haven't found that one again yet, but I've been reading another series starting with The Strange Power and it's delightfully 90s. I wish I'd read this one as a kid because I think it's slightly more age-appropriate (I vividly still remember in the one I read as a kid there's a blood sacrifice scene where a character I think bites herself to bleeding in order to provide the sacrifice) and exciting in how it's written too. Not unlike a proto-Runaways.

It's also very diverse for its time! That said, I think Gen Z (-led) discourse is guilty of making the 90s sound like the distant past and far more conservative than it actually was. Here, the main character is a white girl, but of her companions, one is Native (and treated without any heavy stereotyping or microaggressions that I picked up), another is East Asian, another is from the foster care system, and the fifth has a learning disability. Later on a character with punk style and a character who uses a wheelchair are introduced as well.

Who remembers the massively successful Point Horror series? If you're unfamiliar with these stories; back in the 1990's these books had young people visiting bookshops and libraries en masse.