When I first did the C2C, est to west, I used Harveys maps. I'm coloured blind (red/gree I believe) and I could only read them in natural daylight. If in a pub, under lights, all I could see was a blur.
I use the Wainwright guidebook and it's very good maps.The 1:40,000 Harvey strip maps (which Ive tried) are useless imo. Not enough detail in places, best stay with 1:25,000 os.