Consider phlebas is good, but I usually recommend Player of Games as the starting point to my friends.
It gives a good introduction to the Culture, has games as a familiar touchstone, and is overall one of my favourite books in the series anyway.
The series is mostly fine to read entirely out of order, though, which is fairly impressive just a literary feat. It does make references and callbacks with some frequency but mostly it's not anything that you would have needed to know about, you'd just have a ittle more context available to you.
Part of why I specifically wouldn't suggest Consider Phlebas to start is that it has a much more different feel to the other books. Being hundreds of years in the past of basically every other book and having very little actual Culture involvement makes it seem very disconnected to me.
It gives a good introduction to the Culture, has games as a familiar touchstone, and is overall one of my favourite books in the series anyway.
The series is mostly fine to read entirely out of order, though, which is fairly impressive just a literary feat. It does make references and callbacks with some frequency but mostly it's not anything that you would have needed to know about, you'd just have a ittle more context available to you.
Part of why I specifically wouldn't suggest Consider Phlebas to start is that it has a much more different feel to the other books. Being hundreds of years in the past of basically every other book and having very little actual Culture involvement makes it seem very disconnected to me.