Dr Madsen Pirie 
101 Great Philosophers [PDF ebook] 
Makers of Modern Thought

101 Great Philosophers is a concise and accessible guide to 101 of the greatest minds that contributed to the legacy of western philosophy. From the ancient Greeks to present-day thinkers, Madsen Pirie employs concise entries, each on a single page, to give a snapshot of the contribution made by 100 key philosophers to the development of this fascinating subject. This book provides a sparkling insight into the lives and times of each philosopher covered – explaining just why what they had to say was so innovative and inspiring.
Essential reading for anyone coming to the subject for the first time, this book is an indispensible introduction to the most important ideas in the history of western thought.