Hello and welcome to EmpowHer,
There are many books on PDD-NOS including:
--Pervasive Developmental Disorder: An Altered Perspective by Barbara Quinn
--Unraveling the Mystery of Autism and Pervasive Developmental Disorder by Karyn Seroussi
--A Strange World - Autism, Asperger's Syndrome And Pdd-nos: A Guide For Parents, Partners, Professional Carers, And People With Asds by Martine F. Delfos
Below I pasted a link to a website telling Emma's story who has PDD-NOS: https://emmashopebook.com/tag/pdd-nos/
I hope you find these materials helpful.