Also, Revealing the Inner World of Traumatized children, An Attachment Informed Model for Assessing Emotional Needs and Treatment. Not sure that this won't be too clinical for what you are looking for @Teasel, but thought I would throw it out there just in case.
You would probably find Developmental Psych / Development Through The Lifespan textbooks quite useful… as I know you’re keen on research… and these books lay out everything from a very neutral perspective / including theories & divergences from every school of psychooogy, as well as the entire spectrum of responses (not just PTSD, and not just trauma). They not only provide a really fantastic framework / frame of reference, but a fantastic launch pad for further adv. study in normal Autistic development & challenges, early childhood development + trauma, and trauma+autism .
Textbooks are expensive as all get out, but? They can be rented for 3, 6, or 12mo, or bought used, for really reasonable fees.
One of the things I love about hitting up university book stores is that text books are so much more free of bias, than when a fraction of those principles & theories are being interpreted by someone else, and then written about.
Having an expert/author interpret and relay/translate into plain English is also useful. I’ve just come to adore removing the middleman, to get the straight info, rather than what any individual deems important (or unimportant, and leaves out!). <<< It also adds a lot more depth, when I DO pick up pop-psych books, because I can compare/contrast different interpretations of the same thing. >>> Like being with a bunch of friends all discussing the same movie we’ve seen, and getting different insights & perspective; rather than watching the preview (pop psych), or the movie all by myself (textbook-psych).