Henry Louis Mencken 
The Philosophy of Friedrich Nietzsche [EPUB ebook] 

Nietzsche left no systematic exposition of his philosophy, and so it remains the subject of intense scholarly dispute and interpretation. Because of Nietzsche’s evocative style and often outrageous claims, his philosophy generates strong reactions of passionate love and disgust. The Philosophy of Friedrich Nietzsche by Henry Louis Mencken was the first, and many believe the best book on the subject. Mencken was known for his attention to detail. This book is a must read for anyone who wishes to understand Nietzche and his underlying philosophy.