This encyclopedia from Macmillan Reference USA explores a wide variety of philosophical topics. It includes many updated entries from the first edition, along with 450 entries on new topics.
"The reader will find substantial essays on all the major figures of the Western philosophical tradition, likewise on all major topics and those we judged to be of most help to a student readership" (from the Introduction).
From publisher's abstract: "epistemological and metaphysical concerns that shaped the conceptual languages and philosophical thought of sub-Saharan Africa."