Summary: A compendium of invented factoids, presented in an arch, tweedy, ponderous style for comic effect. The full title is a good example of the style:

An almanac of complete world knowledge
compiled with instructive annotation
and arranged in useful order by me,
JOHN HODGMAN
a professional writer, in
THE AREAS OF
MY EXPERTISE
which include
matters historical -- matters literary
matters cryptozoological -- hobo matters
food, drink & cheese (a kind of food)
squirrels & lobsters & eels
haircuts -- Utopia
what will happen in the future
and most other subjects
illustrated with a reasonable number of tables and figures
and featuring the best of
“Were you aware of it?”
John Hodgman's long-running
newspaper novelty column of strange facts
and oddities of the bizarre
“The almanac that contains no weather information
and, once placed on your shelf, will secretly replace
all neighboring books with its own text”