I read Hail Mary last year and remember enjoying it, though I went in blind. Afterwards I read the blurb and it gave away something that happens in the middle of the book, which I wasn't expecting to happen because I knew nothing about the book. So I advise going in blind if you can.
I remember that I really enjoyed the Dirk Gently books when I had read them. Unfortunate that Adams didn't write more in that series. I absolutely love his writing. Planning to listen to the books when I finish And Another Thing.
I've just read the first one, my first introduction. But I then went on to watch the netflix series, maybe next year I'll read the other books and see how they compare.