Any pregnancy books for an 8 year old to understand?

[Lucymumof1]

My 8 yo is autistic and I’m about 5-6 weeks pregnant, so we’re not telling anyone just yet but we know he will be ok with the news as he has been asking for years for a sibling but he thinks I can just go buy one and it’ll be the same age as him (if only) so I was wondering if there are any pregnancy books that are aimed at children so they can understand it all and feel included as we have mentioned getting a few books ourselves. Thank you

[practicallyperfectmummy]

I had this for my two little boys when I was expecting my 3rd it's lovely. Lots of them around on eBay and Amazon.

[Ricekrispie22]

This is by far the best www.amazon.co.uk/Whats-There-About-Before-Were/dp/1406349313?tag=mumsnet&ascsubtag=mnforum-21
There's also a Topsy and Tim: The New Baby book and a decent YouTube video of the dramatised version of this story.
Aren't You Lucky? by Laurence and Catherine Anholt is really positive.