Loved the Culture and Children of Time series, can’t wait to read the newest Children of Time book as well. I’m stuck on Surface Detail currently because the phone I pirate ebooks on died, but I was having trouble getting into the vibe of the book, but definitely looking forward to finishing the series. Common suggestions from Reddit would be The Expanse series by James SA Corey, there’s an incomplete Amazon show based on the series, but the books have a fantastic conclusion. Another good one is John Scalzi’s Old Man’s War Some more “pulpy” “mary-sue-ish” suggestions, the Honor Harrington universe books by David Weber, or Jack Campbell’s Lost Fleet series (also has cool spider aliens). Peter F. Hamilton has the Commonwealth series, or you can go old school and read Isaac Asimov’s Foundation series, both are really interesting. Then there’s the Hyperion Cantos for some really good mystery/sci-fi horror. The Clone Republic by Joe Kent was pretty interesting but gets a bit Mary Sue-ish later in the series. Vatta’s War series by Elizabeth Moon, was pretty good as well, can be Mary Sue-ish, but overall pulled off most of the series well. Seveneves by Neal Stephenson is very similar to children of time in tone. Also Snowcrash by Neal Stephenson is a satire that is one of the original cyberpunk novels, and is a must read because it is unironically the blueprint for what tech bros like Musk, Zuckerberg, and Thiel want the world to look like (it ain’t pretty so arm yourself with knowledge). Neuromancer by William Gibson and it’s sequels are the other original cyberpunk, Altered Carbon by Richard K Morgan is similar and great, the Netflix series could have been better. The Bobiverse is another outstanding suggestion, by Dennis E. Taylor, a real interesting and unique take on similar topics covered in Children of Time. Ray Bradbury’s Childhoods End fits here as well. Red Rising and Dungeon Crawler Carl are both very popular modern suggestions that I haven’t read myself. There’s a few series and books by the following who fit as well: CJ Cherryh, Larry Niven, Archur C Clarke. Last but not least, Dune, Enders Game, Starship Troopers, and Operation Hail Mary all fit as well. Good luck and happy reading.