-* [Barker's Lambda Tutorial](http://homepages.nyu.edu/~cb125/Lambda): tutorial with embedded Javascript code that enables a user to type a lambda form into a web browser page and click to execute (reduce) it.
-* [Penn Lambda Calculator](http://www.ling.upenn.edu/lambda/): requires installing Java, but provides a number of tools for evaluating lambda expressions and other linguistic forms.
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-##[[Schedule of Topics]]##
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-##[[Lecture Notes]]##
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-##[[Offsite Reading]]##
+* Another good book covering the same ground as the Hankin book, but
+more thoroughly, and in a more mathematical style, is *Lambda-Calculus and Combinators:
+an Introduction*, by J. Roger Hindley and Jonathan P. Seldin, currently $74 hardback / $65 kindle on [Amazon](http://www.amazon.com/dp/0521898854).
+This book is substantial and though it doesn't presuppose any specific mathematical background knowledge, it will be a good choice only if you're already comfortable reading advanced math textbooks.
+If you choose to read both the Hankin book and this book, you'll notice the authors made some different
+terminological/notational choices. At first, this makes comprehension slightly slower,
+but in the long run it's helpful because it makes the arbitrariness of those choices more salient.