Just when you think the author has made his point . . .

[I]t may seem that we have a satisfactory outline and that the rest is just details. But when all seems crisp and clear and yet you're only halfway through a book, a plot twist lies around the corner.

Menno Schilthuizen, Nature's Nether Regions: What the Sex Lives of Bugs, Birds, and Beasts Tell Us Abut Evolution, Biodiversity, and Ourselves (New York: Penguin Books, 2015), p. 107