I bought Realm of Racket about a month ago in hopes of learning a Lisp and I’m working my way through it, but I have some questions about the challenges at the end. Namely, I’m stuck. Are there solutions to these posted anywhere? Or how can I get unstuck?

procload: asking questions here or IRC is a good bed (I see you were in IRC earlier). It looks like you logged off IRC so I’ll answer your most recent question here:

You don’t need to complete any of the exercises at the end of each chapter before you go on the next (Some the later ones are actually quite hard).