Sweeping Changes Planned for Amazon's Review System

SEATTLE—APRIL 1: Concerned over customer and author complaints about its reader reviewing system, Amazon is planning drastic changes in the way customers will be allowed to review books.

The centerpiece of the new plan, called “Twice as Nice,” which is to be unveiled formally later this month, requires reviewers to leave two positive comments for each negative comment they make in an individual review. An anonymous company executive explained, “If you say, for instance, that an author couldn't wr