I've read the first three volumes. And recently when paring down my collection, it went out. Sorry, Donald, but you've got too much about multi-phase tape sor

I've read the first three volumes. And recently when paring down my collection, it went out. Sorry, Donald, but you've got too much about multi-phase tape sorts and not enough about current programming. I started volume four but couldn't get my head around the first page, and am very dubious that plowing through it would have any real value.