🚀 go-pugleaf

I recently (yesterday) picked up a book called Programming With Sets:
An Introduction to SETL.  First, after leafing through it, it seems
to be in the same genre as the Lisp 1.5 Manual of yesteryear.  I starts
explaining what SETL is, seems to give up and start explaining how to
program, perhaps in SETL, gives up on *that* and starts into some examples,
and after that looks at how SETL can be implemented.

Despite this mess, I find the language (but perhaps not the book) a nice
piece of work.  Does anyone know where I can find out more about it?
Specifically, are there any free compilers for it?  Any compilers at all?
(In my glance at the book, I wasn't clear on whether this language is
interpreted or compiled.  It seems like the former is the case, with 
some capability for an internal compact "object" code format.)
Is there any general source of information on this language?


-- 
John Lacey           |  Internet:  lacey@tcgould.tn.cornell.edu
running unattached   |  BITnet:    lacey@crnlthry
                     |  UUCP:      cornell!batcomputer!lacey
"Whereof one cannot speak, thereof one must remain silent."  ---Wittgenstein