Are you experienced in Common Lisp? Racket is multiparadigm too.
As such, many good multiparadigm books will be of great help. E.g. SICP, but also the much less known yet equally fantastic CTM. None are written in Racket, although SICP with Scheme is close, but many concepts can be ported.
There's also excellent Lisp literature like Lisp in Small Pieces or PAIP, that are always worth to consider.
For working through SICP, you can actually use the Racket tools, like the DrRacket IDE. We rigged up a simple `#lang sicp` that emulates the version of MIT Scheme used for SICP problem sets: https://docs.racket-lang.org/sicp-manual/
As such, many good multiparadigm books will be of great help. E.g. SICP, but also the much less known yet equally fantastic CTM. None are written in Racket, although SICP with Scheme is close, but many concepts can be ported.
There's also excellent Lisp literature like Lisp in Small Pieces or PAIP, that are always worth to consider.
Racket also implements most of http://www.eopl3.com/, which is a great textbook.