Is there a good introductory text on the medical side of transitioning?

I'm discussing trans issues with someone whose heart is in the right place but who hasn't yet gotten into the science or theory of transition therapies/surgeries. In particular they're hung up about three issues:

1. Puberty blocking in FtM transitions and its impact on afab anatomical development if that transman doesn't go through with the full transition

2. The underlying science of gender dysphoria and how much that impacts someone. Specifically addressing it through talk therapy versus the necessity of presenting as a different gender and getting the reassignment surgeries

3. The concept of gender as a fluid cultural costume rather than a biologically hard-coded identity, and the gender spectrum more broadly

Having discussions about it is making good progress but I also don't have a solid handle on the science to make definitive arguments. Is there a book, collection of studies, or video essay/podcast that provides a good overview of these questions in particular?