SOLVED. Book about a female detective investigating interesting murders/kidnappings. Spoilers ahead. [s]

[Stephanie]

I haven't read it but I remember seeing something like this in my recs -- maybe Eeny Meeny/the Helen Grace series by by M.J. Arlidge?

[Stephanie]

You're welcome! And no worries about spoilers. I skimmed over the more detailed spoiler section and if I do end up reading it, I'll have forgotten anything specific I read by that point.