Stuart George Fullerton 
Handbook of Ethical Theory [PDF ebook] 

This book, originally published in 1921, was written to help students of ethics comprehend the significance of morals and ethical behavior. We are all amply provided with moral maxims that we hold with more or less confidence, but an insight into their significance is not attained without reflection and some serious effort. In a field in which there are so many differences of opinion, clearness of insight and breadth of view are eminently desirable.