+* *The Little Schemer, Fourth Edition*, by Daniel P. Friedman and Matthias
+Felleisen, currently $23 on [Amazon](http://www.amazon.com/exec/obidos/ASIN/0262560992).
+This is a classic text introducing the gentle art of programming, using the
+functional programming language Scheme. Many people love this book, but it has
+an unusual dialog format that is not to everybody's taste. **Of particular
+interest for this course** is the explanation of the Y combinator, available as
+a free sample chapter [at the MIT Press web page for the
+book](http://www.ccs.neu.edu/home/matthias/BTLS/).