The following publication: Parent-Led CBT for Child Anxiety: Helping Parents Help Their Kids may be of interest.  This link takes you to the publication (other suppliers are available).

https://www.amazon.co.uk/Parent-Led-CBT-Child-Anxiety-Helping/dp/1462527787/ref=sr_1_2?keywords=cathy+cresswell&qid=1556740383&s=gateway&sr=8-2