I am writing a series of 5 books on Training for various distances of running - 5km, 10km, 1/2 marathon, full marathon and beyond, and nutrition for running.
I am looking for cover design for this series.
The 5 covers must be recognisable as belonging to the same series of books but also be easily differentiated
The titles are
Simple (Not Easy) 5k Training
Simple (Not Easy) 10k Training
Simple (Not Easy) Half Marathon Training
Simple (Not Easy) Marathon Training
Simple Nutrition for Runners