So, here's the problem: nothing else he's written is really like Railsea. Alas.
You might like Un Lun Dun, his children's novel; I didn't, but lots of people did. It didn't hit the sweet spot for me that Railsea did, and the tone tipped over into twee. For me. But it's probably the closest in tone and content.
I have not yet read Embassytown and Kraken, but both sound interesting.
The City and the City has an amazing concept (two cities which exist in the same space - it's complicated), but very restrained writing; I found it intellectually interesting but emotionally dry.
Perdido Street Station and The Scar have fantastic gonzo worldbuilding, and are very energetic and fun. They are also somewhat similar to Railsea. However, they are also extremely dark: in both books, the most likable and uncomplicatedly sympathetic characters meet horrible fates in a manner that was a bit "squashed by the hand of the author." PSS additionally has (off-page) rape. However, if you're up for that, I did find both tremendously enjoyable, and The Scar does end on a moving, uplifting note. You don't have to read them in order, but The Scar refers back to some events from PSS.
The Iron Council is set in the same world, and is similar but doesn't work as well as a whole. It has some great bits, but I wasn't engaged by the characters the way I was in the other two books.
no subject
You might like Un Lun Dun, his children's novel; I didn't, but lots of people did. It didn't hit the sweet spot for me that Railsea did, and the tone tipped over into twee. For me. But it's probably the closest in tone and content.
I have not yet read Embassytown and Kraken, but both sound interesting.
The City and the City has an amazing concept (two cities which exist in the same space - it's complicated), but very restrained writing; I found it intellectually interesting but emotionally dry.
Perdido Street Station and The Scar have fantastic gonzo worldbuilding, and are very energetic and fun. They are also somewhat similar to Railsea. However, they are also extremely dark: in both books, the most likable and uncomplicatedly sympathetic characters meet horrible fates in a manner that was a bit "squashed by the hand of the author." PSS additionally has (off-page) rape. However, if you're up for that, I did find both tremendously enjoyable, and The Scar does end on a moving, uplifting note. You don't have to read them in order, but The Scar refers back to some events from PSS.
The Iron Council is set in the same world, and is similar but doesn't work as well as a whole. It has some great bits, but I wasn't engaged by the characters the way I was in the other two books.