<P> Since November 2007, both the Windows and Mac electronic editions of World Book Encyclopedia have been developed and published by Software MacKiev . </P> <P> Other World Book products include: </P> <Ul> <Li> World Book Online </Li> <Li> World Book eBooks </Li> <Li> Early World of Learning </Li> <Li> Childcraft </Li> <Li> World Book's Animals of the World </Li> <Li> Building Blocks of Science </Li> <Li> Building Blocks of Mathematics </Li> <Li> Enigmas of History </Li> <Li> Endangered Animals </Li> <Li> Discovery Science </Li> <Li> Dinosaurs! </Li> <Li> A Look At...</Li> <Li> Anti-Bullying Basics </Li> </Ul> <Li> World Book Online </Li>

When was the last world book encyclopedia published