60/150 Maybe it's not fair, since my last two books were 5 🌟 reads, but this was pretty meh. I don't mind hard science science fiction, and I've enjoy several of Clarke's books, but I felt this lacked the sense of awe and wonder you would expect from the exploration of an alien spaceship. Also, I thought the ending left too much unanswered. 3 ⭐⭐⭐