u/h8topia

hi, i love reading but i almost only read fantasy. one of my friends asked me for recs (she doesnt read) and chose mystery books.
what mysteries do you recommend that aren't too slow and long? i really want her to start reading so i dont wanna mess this up!! the only mysteries i've read are "the god of the woods" and "the secret history". i loved them but i fear theyre too slow and she'll get bored and stop