This book was first published in 1960 and later completely revised in 1989, my version is a reprint from 1992.

As the title says it's a Concise Encyclopedia, it is about 330 pages so the entrys are short, but they are good, reasonably clear and to the point.

I used this book a lot when studying Philosophy, the good thing about this Encyclopedia is that not only does it cover Philosophical terms but also Philosophers and their main theories, and it is Cross referenced with Bold type.

So it's a good basic Encyclopedia, And it worked well for me and continues to do so.