amazon card - is it worth it?

[r3vbr]

Seems like two free poker books..
30$

https://www.amazon.com/exec/obidos/flex-sign-in-done/002-4724420-0348042

didn't quite understand the conditions though
what does APR mean? I'm not american.

[Dangergirl]

APR = annual percentage rate. It means the yearly cost of interest expressed as a percentage.