Know Your Traffic Signs: Official Dept of Transport Edition.
This is an easy to comprehend book, with good graphics and a lot of straight forward language. When taking driving lessons you will never come across all of the countries traffic signs, this book will give you a good knowledge of signs and road markings you wouldn’t generally see. Who knows what a hazard warning line is or what an equestrian crossing is? All this information and more is in the book, take a look at it at Amazon.