because Christmas is an excellent holiday and people don't want the spririt to leave them

Blues' Blues was created in 1972.

Blues on Top of Blues was created in 1968.

She has an oversized thumb. It's based on a book by Tom Robbins (best author ever by the way). Read it, it's excellent.

Delta Blues, often called the original blues. This includes Robert Johnson, Leadbelly, and Son House. Chicago Blues, which is basically the delta blues but electric. Muddy Waters is considered the first, but there is also Howlin' Wolf and Little Walters solo stuff is quite good. Texas Blues, Memphis Blues, Detroit Blues and then Blues Rock that originated in the 1960's.