Pohl filling in for retired Arthur C. Clarke

According to David Langford's blog Ansible:

Arthur C. Clarke is no longer writing, and has asked dynamic young author Frederik Pohl (born two years after ACC) to finish his new novel. `Talked to Pohl recently, and he was doing it,' confirms Charles N. Brown. It is rumoured that this came as a surprise to Greg Benford, who had rather expected to be called on for the task.