Because I run four times a week and have completed a few half-marathons, I thought I knew a lot about running.
But reading How to Run, written by one of the world's most successful marathon runners, Paula Radcliffe, I realised I knew very little.
This book took me back to basics, and taught me about race preparation, diet, equipment, training and techniques.
It has enabled me to revise my running style and I have picked up some invaluable tips while on the way to attempting my first marathon.
How to Run is ideal for novices and for experienced runners who have pounded the roads for years and are looking to make up that bit of time during their next marathon.