Elysian Shadows

I just got a barnes and noble gift card for Xmas (and one for my birthday wich is coming up soon). I was wondering what is a good cheap book for programming in any of these langauges.
C(++)
Ruby
Lua
Perl

I'm looking for relativily cheaper books (under 50 bucks). Thank you guys for your help.

I can easily recommend "C++ Primer Plus" by Stephen Prata. It's a tad more expensive at B&N than it is on amazon, but I guess it's still better than the list price.

JaxDragon wrote:I can easily recommend "C++ Primer Plus" by Stephen Prata. It's a tad more expensive at B&N than it is on amazon, but I guess it's still better than the list price.

Seconded, best C++ book I have ever owned