This series is a fun read. I was a fan, when my son was around 11, of a series called "Animorphs". This is as engaging and fun, with a modern take, (cell phones, texting, special apps, etc.). The main character, Tory, niece of Tempe Brennan from the "Bones" franchise of novels that I love so much, is a strong character,along with her cohorts, (all guys!) they are quite a team. The first novel, which describes the kids, has great character development and describes their personalities and quirks, which are such that they mix well as companions. They are inquisitive and smart, which leads to being at odds with their parents and authority figures. I will not provide spoilers. If you like young adult novels, as a young adult or older, have fun with this! And this could become an addictive addition to your serial reading!