Which book by Nevada Barr is your favorite?

1.
Deep South (Anna Pigeon, #8)
Deep South (Anna Pigeon, #8) 3.97 avg rating — 9,039 ratings
2.
Track of the Cat (Anna Pigeon, #1)
Track of the Cat (Anna Pigeon, #1) 3.84 avg rating — 22,112 ratings
2.
Firestorm (Anna Pigeon, #4)
Firestorm (Anna Pigeon, #4) 4.01 avg rating — 10,211 ratings
4.
What Rose Forgot
What Rose Forgot 3.65 avg rating — 8,528 ratings
5.
Ill Wind (Anna Pigeon, #3)
Ill Wind (Anna Pigeon, #3) 3.93 avg rating — 10,932 ratings
6.
Borderline (Anna Pigeon, #15)
Borderline (Anna Pigeon, #15) 3.93 avg rating — 8,642 ratings
7.
Winter Study (Anna Pigeon, #14)
Winter Study (Anna Pigeon, #14) 3.87 avg rating — 9,309 ratings
8.
Endangered Species (Anna Pigeon, #5)
Endangered Species (Anna Pigeon, #5) 3.88 avg rating — 8,254 ratings
9.
Hard Truth (Anna Pigeon, #13)
Hard Truth (Anna Pigeon, #13) 3.88 avg rating — 7,489 ratings
10.
13½
13½ 3.39 avg rating — 4,183 ratings
11.
Destroyer Angel (Anna Pigeon, #18)
Destroyer Angel (Anna Pigeon, #18) 3.86 avg rating — 6,774 ratings