Frederick Copleston's original nine-volume A History of Philosophy began as an attempt to provide Catholic seminary students, whom Copleston believed were being woefully undersold in philosophy, a comprehensive but accessible guide to the ideas and individuals that have shaped philosophy. His work went on to be regarded by many a single best history of philosophy ever written in English.
Coplsteon's work sought provides a detailed, and by consensus fair, treatment of the major philosophers and their ideas from the Pre-Socratics all the way up to Levi-Strauss. He skillfully avoids simplistic caricatures and his narrative sparkles with incident and intellectual excitement giving each philosopher a full hearing with erudition, attention to style, while illuminating each figure has to those who came before and to those who came after.
Nevertheless Copleston, who is well known for his public debates and resounding defenses for the existence of God, never hides his own perspectives--but he also does not use it to truncate or distort others' views. Thus, Copleston's work is remarkably well-rounded, complete, and scholarly. Though originally intended for students, Copleston's work is a staple work for any library; especially those who wish to learn about and engage philosophical questions in an informed manner.
About Volume III
In A History of Philosophy, Volume 3: Late Medieval and Reinassance Philosophy--Ockham, Francis Bacon, and the Beginning of the Modern World, may be the Copleston examines what remains of the Medieval era, while connecting it to the Reinassance that flourished in Europe in the 14th-16th centuries, and the as yet nascent modern world. This includes the revival of Platonism, the rise of scientific thinking, the work of Nicholas of Cusa, and Francis Suarez.