Hi There, Boys and Girls! America's Local Children's TV Programs (Book, Tim Hollis, 2001)

You can digitally borrow it here.

(Video search tip: when searching for any of the shows it mentions, if the show's title isn't enough, try adding the city and/or state.)

Above: Jim and Jane Henson and a drawing by Carroll Spinney (Big Bird, Oscar the Grouch) of his short-lived local TV puppet character.

@skinslip

Labyrinth: The Book of the Film (Book, A.C.H. Smith, 1986)

You can digitally borrow it here.

Aliens in the Family (Videos, 1996)

The obscure short-lived Jim Henson Company sitcom. You can watch all of it, plus promos and retrospectives, here.

You are the Star of a Muppet Adventure (Book, Ellen Weiss, 1983)

You can borrow it digitally here.

Discovered via noted re-cobbler Garrett Gilchrist (@tygerbug), who is daunted by the responsibility this book has bestowed upon him.