All three hit.
After I passed this info along to my agent, he said it didn't make sense---Marks' book (the lowest one) should have moved the most with just a couple of hits.
He also said once he had a guy try to "jimmy" his Amazon rating by having 1700 people on his newsletter list buy the book, and he reimbursed them. He got #2, but it cost him more than he made :)