stat 311 book edition

SO I was trying to buy a book online, but then I dunno what edition that is!! The webpage just showed it as: "minds on statistics"... I tried to search it online, but I found two books with the same name, but the covers are different.. one is blue, one is gray.. Does anyone know which one they're using? I didn't have time to go check at the bookstore cuz I actually still have one more final coming up (since i'm taking 1 class at college..) Can anybody help me? >_