Really good Perl book under a secretive title

Since I've been doing a lot of LDAP programming lately, I finally broke down and bought O'Reilly's LDAP System Administration.  I found a used paperback for $4!  While I was waiting, I got impatient and bought the Kindle version for my Android phone.  I just bought it for the LDAP ACL info but I was thrilled to see chapter 10 was devoted to Perl-LDAP.  It explained a lot of things in the Perl-LDAP example code that I hadn't seen explained before (I'm sure it's out there but the author has done a nice job of digging it all up and putting it together).  Anyway, if you're looking for a nice LDAP book, this is looking like a good one so far (still reading).