Tried to listen to this as audio, which I think was a mistake. If I'd been reading text, I would have been able to skip the many, many repetitive parts in the present-day ("something is wrong," "did we get the fix?" "the phone line was busy again") and just focused on the time-travel part. But I just had to stop, 2.5 hours in -- and I would have stopped 1 hour in had I not been driving a 7-hour haul. I understand from other reviews that it does get stronger in the second half, but I've spent as much time in the muck as I care to.