Can someone recommend a not crazy Christian self help/therapy book?

I'm not christian, but my mom is. She's finally starting therapy. I'd like to send some helpful books or resources between her therapy sessions. I know she's related well to Christian ones, however a lot of Christian ones just say rely in Jesus & dont really have anything helpful like grounding methods.. so if anyone can recommend some that have actual helpful things that'd be great... She's specifically looking for help with anxiety