Haven’t seen the movie yet, but the book is definitely one of my all time favourites, so I would recommend reading it regardless of the movie.

The way the book is structured there is only one big reveal that would be spoiled by the movie, but I don’t think that was the most interesting thing in the book anyways, it was all about engineering, the scientific method and all that, and I think that will still hold before or after watching.

The one big exception I’ve found to “read the book first” advice to me has been “the expanse” there the books and the series were so great that they sort of complemented each other, and the advice there is “definitely do both”. I was reading the books and watching the series in parallel - side by side.

I do hope Hail Marry is like that…