According to John Hodgman, in The McSweeney's Joke Book of Book Jokes, authors and books are funny "because they are sad. They are as sad as zeppelins are -- they wish to soar, but they are using a technology that is old, largely forgotten, highly flammable."
Hodgman triggers a synaptic linkage, bringing a huge, old, largely forgotten, highly flammable rock band to mind. Unlike cartoonist Ellen Forney, who wrote and illustrated the comic "I [heart] Led Zeppelin," my feelings are complicated. I don't [heart] them uncritically. It's more of a love/hate relationship. They are overwrought, lumbering, reactionary, and personify all the rockist wretched excess of stadium groups punk came along to destroy. Zep stocks the "classic rock" stations like rack-jobbers, providing tired old warhorses for button-down nostalgics, and false memories for kids who weren't even there in the first place. Honestly, I could do without hearing "Stairway to Heaven" ever again.
On the other hand, once in a while, the behemoth lifts off. Those moments rattle me with cognitive dissonance; I know I shouldn't like it, but I do. The earth moves, and Led Zep, that improbable wasp trapped in fossilized amber, somehow takes wing. Watch this clip of "Kashmir." You wonder, will this thing ever fly? It does.