Book for Husband – Newer to Reading

I am looking for some books to give to my husband (35M). When we met six years ago he was reading "The Sun Also Rises"… he didn't finish it, and didn't really pick up a book for years.

I finished reading "Neverwhere" by Neil Gaiman when we were on holiday in January 2022. He picked it up, read it on the beach and got briefly gung-ho about reading. His friend gave him a self-published book he had written about the meaning of life. Unsurprisingly he got 50 pages in and tapered off.

The last year he has picked up again. He has read the following:
– American Gods, Neil Gaiman (loved)
– American Prometheus, Kai Bird and Martin Sherman (enjoyed from a knowledge level, but it took him a really, really long time to read and he was never excited to turn off the tv to go to bed and read)
– Elantris, Brandon Sanderson (said it was too romancey)
– Flowers for Algernon, Daniel Keyes (loved)
– World War Z, Max Brooks (enjoyed and read pretty quickly)

I read a lot of high fantasy and historical fiction, but I think most of my books have too much romance (I mean, Brandon Sanderson, lol). All the books he has read have come from my bookshelf, but I'm running out of books that I think he would like.

Please send me your recs. It doesn't have to be totally in line with the above, again, these were not books he picked up at a bookstore, but from what I had available at home.