My entries on Wole Soyinka and Grace Ogbot were recently published in Wiley-Blackwell’s The Encyclopedia of Postcolonial Studies. The reference work is available in print or online (along with the publisher’s other encyclopedias). Its online access is pretty cool because you can move between it and The Encyclopedia of Victorian Literature, The Encyclopedia of British Literature: 1660-1789, The Encyclopedia of the Gothic, and several others.