The Great Courses Myths, Lies, and Half-Truths of Language Usage is an educational DVD course presented by Prof. John McWhorter, focusing on exposing common misconceptions and inaccuracies in language usage. With a publication year of 2011, this intermediate-level textbook covers a wide range of general language topics in English. Produced by Teaching Company, LLC, T.H.E., this DVD set is suitable for adult and further education levels, making it a valuable resource for those looking to deepen their understanding of language usage and communication.