Matz's new book?

I searched the web for Matz’s book on Ruby and came up with the following


The Ruby Programming Language
Yukihiro “Matz” Matsumoto, Keiju Ishituka
Addison-Wesley, Paperback, Published July 2002, rb_pr_ln_t_aa, ISBN

Some sites (Amazon) say this is published in May 2002, some say it is not
yet available and some (like the one above) say it will be published in July

Does anybody know what the true date it?

I went to the publisher’s site ( and tired searching it with all
criterion (TITLE , AUTHOR, ISBN) but nothing came up.
Surprisingly the results were not much different even for the pick-axe book

Any help will be welcome. Thanks,
– Shanko