I was amazed how quickly I read this book, which is 248 pages long. Warburton writes in plain English, which explains why the book is such an easy read. He provides a quick overview of the seminal work of 40 prominent philosophers, ranging from the Classical Socrates to the modern Australian, Peter Singer. The book allows about six pages for each philosopher, and it gives a clear description of the main work that has made each of these philosophers famous.
An excellent book for the general reader, like myself, who would simply like to learn a bit more about philosophy. I suspect that it might be too lightweight for an undergraduate seriously studying Philosophy at university.
Highly recommended for the general reader.