Medical Medium books, once you build up health, physical and mental the confidence comes back.

I think your best bet is google or your local library. Have a look, see what suits you

I don’t know of any good books, but I found talking with my teen and giving her advice, as well as listening to her concerns and answering her questions was good for our relationship.

For younger kids I like “you’re Special” from Max Lucado, and for older kids “You are Enough” from Cassie Mendoza-Jones.

go for a browse through the library. free to do and you will find a good range

Nope, can’t help you sorry. Have you googled some? Or maybe just head into your local library or book shop and ask about them

You might find something on Maggie Dent’s website – maggiedent.com.

Joining a group can indeed be a good idea.

I know its not a book, but theatre groups can be very good for this – try to find a youth theatre or other creative group – they are usually very supportive. Just an idea.