The first few chapters of the book deal largely with explaining Fort's thesis. As a particular instance, he cites the strange glowing in the sky worldwide, which supposedly resulted due to the 1883 eruption of the volcano Krakatoa. Fort shows that such phenomenon had in fact preceded the eruption by several months.
While Fort has a particular interest in strange "falls" - focusing quite a bit of the book on the falls of fish, frogs, and various unidentifiable materials - he does not focus exclusively on this category. He also has chapters discussing the findings of "thunderstones", which supposedly fell from the sky during lightning storms; a discussion of evidence for the existence of giants and fairies; a brief chapter on poltergeist phenomena; the disappearances of many people; the famous case of the Mary Celeste, a long section on a number of purported UFO sightings; and a mention of the famous "Devil's Footprints" mystery in 1855. (the wikipedia... More > entry on the book)< Less