A review by venneh
The Reaction by K.A. Applegate

4.0

Apparently you can be allergic to animal dna, and when that happens, you lose control of your morphing and eventually Thing birth the dna you're allergic to as a full grown creature from your own body. If you are unlucky enough to be a hormonal teenager, it also triggers with extreme emotions, like, say, a crush on an actor who ends up being a willing and active collaborator for power and safety. And then you end up crushing your home when you turn into a clumsy elephant thinking about him, or morphing between animals without passing back to human form, or almost morphing live on television. Rachel has big baby dyke energy, especially with Cassie.