Given the question: The Robert Johnson Songbook -  The Robert Johnson Songbook is an album by the British blues band the Peter Green Splinter Group led by Peter Green. Released in 1998 this was their second album. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
The answer is:
Album