Books and publications
Books
There are no current textbooks for modern APLs, except J: see wiki:JWiki/Books.
StephenTaylor is writing [:DBook:], an introduction to APL for programmers.
AjayAskoolum’s System Building with APL+WIN is available from [http://www.amazon.co.uk Amazon UK]
Publications
[http://www.vector.org.uk/ Vector] the journal of the British APL Association]
[http://www.acm.org/sigapl/qq.htm QuoteQuad] the journal of ACM SIG-APL