pkrumins/the-little-schemer — pull request #1 by hujinpu (2013-05-05 16:39:31+00:00)
Title: add 09-and-again.ss file

Although you have separate wrote an article to explain "applicative-order Y combinator", but some of the code in the book is not the same to yours.
For the sake of completeness of the project, I suggest that adding the relative code to the file "09-and-again.ss".

Thank you for your great job!