Common Lisp Exercises/Problems [closed]

I'm working through Practical Common Lisp presently

http://www.gigamonkeys.com/book/

It's an excellent book with some practical assignments towards the end, but I'm looking for basic problems that explore the use of functions, variables and macros. Can anybody suggest a suitable resource to work through in order to reinforce the concepts presented?

How do you stop a Lisp from functioning?

To terminate the Lisp system, use the command ":exit" or call the function "(exit)."

How do you reverse a list on a Common Lisp?

In ANSI Common Lisp, you can reverse a list using the reverse function (nondestructive: allocates a new list), or nreverse (rearranges the building blocks or data of the existing list to produce the reversed one).

Project Euler is a great source of programming problems

also, there is Rosetta Code