Books on the journey to birth and its immediate aftermath. But not opinionated tutorial/self-help guides - rather, ones that are relentlessly and neutrally informative on the technicalities of it all, and the envelope of common practices and complications.
Books that chart and canvas the scene. Books for learning.
They've now put all of that on a website: https://www.nhs.uk/conditions/pregnancy-and-baby/
PDFs are still available, but check the information is still correct:
https://www.stgeorges.nhs.uk/wp-content/uploads/2013/11/Preg...
https://www.publichealth.hscni.net/publications/birth-five
https://www.bfwh.nhs.uk/wp-content/uploads/2018/05/Birth2Fiv...
My one bit of advice is to just relax and enjoy it. There's so much pressure put on parents about things that are micro-optimisations (eg breast feeding is best, but some people can't make it work even with support and those people should not feel guilty about formula feeding: their child is not suffering as a result), and some people are weirdly judgmental about this stuff.
There is an interesting old thread about recomendations (not books) https://news.ycombinator.com/item?id=21053211 (90 points, 6 months ago, 110 comments). Including my comment https://news.ycombinator.com/item?id=21053962
I'd add that there is a high chance of spontaneous abortion during the first weeks of pregnancy. Wait until the 8 weeks ecography to tell everyone (or better, wait until the 12 week ecography). I don't have the numbers but it's something like 25% but it is never discused, so it can be a sad surprise.
I agree with the comment of DanBC, breast feeding is best but some people overestimate it and increase the pressure innecesarily (assuming you have easy access to clean water).