From http://bookpool.com/, Perl By Example for $27.50, Perl 5 By Example w/CD for $25.50.

Bookpool has great prices for technical books. I don't think I've ever seen books cheaper anywhere else.

I have no relationship with Bookpool other than being a happy customer.

---
print map { my ($m)=1<<hex($_)&11?' ':'';
$m.=substr('AHJPacehklnorstu',hex($_),1) }
split //,'2fde0abe76c36c914586c';
[download]

Yes, they might have good prices but it depends where you live. Bookpool's default shipping prices for a single book are for when "shipped to a commercial address in Washington DC 20230." If, for example, you live in Canada, they'll charge you around USD $28.00 just for shipping!.

So it isn't necessarily as good a deal as it seems.