Without even an iota of doubt..Kaplan
....make it a point to buy both math and verbal workbooks from Kaplan
.What I like abt PR ...is their sentence correction startegy..the 7 rules that they state.For the record you gotta have tests from both Kaplan
Hope this helps.
"Start By Doing What Is Necessary ,Then What Is Possible & Suddenly You Will Realise That You Are Doing The Impossible"