Ocean at the End of the Lane is a great 2nd to read if you enjoyed Neverwhere!

I was also listening to Evan Doorbell’s telephone tapes [1] as I read Exploding the Phone, which was super interesting because you can see the events of the book line-up with some of the comments Evan and other phreaks make on the tapes (like phone company security agents harassing them at their schools)

[1]: https://www.evan-doorbell.com/