Adopting Older Children

[Runner31]

So, we're going through the adoption process and are hoping to adopt a sibling group up to the age of 9yrs.
I wondered if anyone could offer any advice on what to expect with older children. I know every child will be different but with things like our books we do to give to them, do we call ourselves mum and dad? Was there any resentment towards you? What are the introductions like?
Any advice or stories of adopting older children would be grateful accepted. We have said we will adopt from 3yrs and older but we're really hoping for older children.

Thanks so much. My husband and I will watch the YouTube video and I'll look at the website. I'm pretty sure the FC's reasons were as you said, she thought it was better than them living in the unknown and I'm pretty sure if I looked it up I could come up with a tonne of reasons she was right and a tonne of reasons for doing things a different way.

Think I will give 90yr olds a miss.
Thanks @jellycatspyjamas, I happened to spot The Body Keeps the Score when I was shopping today so I can get started on that one. I'm really enjoying the Dan Hughes books. They explain things quite simply and clearly. As I said I've been working within attachment theory for years and have often mentioned theories, techniques to my husband who mostly switches off when it comes to my work chat. He recently started reading a book on attachment theory and is now telling me all the practice and theory I've been trying to tell him about for years 😂.

What book did your husband read on attachment theory, just out of interest? Thanks!

Attachment in common sense and doodles. By Miriam Silver, one of our social workers recommended it. There are activities in it to help understand it and I think he's enjoyed them.