I want to read Purely Functional Data Structures. I've easily found the thesis (which is freely available as a PDF), but see that there's a book available also. So I'd like to know what the differences are, if any, between these two publications.
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Here's a blog post by the author, where he says
As an owner of the book (though I haven't gotten through much of it) I can point out that it adds a rather large appendix with Haskell translations of his ML code.
Aside from that, it looks like he's essentially taken his thesis, reworked it and officially published it, much like you'd see out of a new edition of any programming reference out there. You can probably get a lot out of the thesis for free, but there will be some fixes, rewordings and extra references available in the book.