ODD & Therapy

We have just found a therapist for my 10 year old son who was diagnosed with celiac at 7. He’s a spitfire redhead, stubborn as can be, and can be violent and rage. She is a believer, and even one like us (we believe whole Bible) he really likes her. And my 10 year old says he will keep going. I mentioned we were doing this parenting training course and she approved but should I also mention or ask about him being ODD? Or let her determine that so I am not inflicting the outcome? Pretty much every ODD video you did on YouTube was 100% spot on. Not so much ADD though.
Also are there books for teenagers too? My 13 year (and the 10 yr old for that matter) refuses to listen to the books. The 7 year old loves them!!!! Oh but he mentioned Porter who’s 4 should have a booster seat…
These boys are too smart. I’m ordering a set for my sisters children too!!!
Thank you Stephanie Penland