This is actually a very good book to begin his studies in reading ECG (or to revise qqs after years without use). Certainly the book is done in a very easy language, or even familiar, it is perhaps surprising when compared to other scientific literature. But I think it's not so bad, because Ca makes easy reading, even in places where one can focus less well (eg train / metro). It contains all the basic elements to correctly interpret an ECG, it is really helpful for students who start ECG study (or general / resident doctors (not cardio)) But if you plan to do a specialization in ECG / become a cardiologist I recommend you look for another reference work, because it does not include all the less frequent pathologies. (But this was not the aim of the author as it is clear in the title) So I can strongly recommend this book to everyone who wants to get the basic knowledge of an ECG in a minimum of time.