Gould's Book of Fish, Richard Flanagan
That a book should never digress is something with which I have never held. Nor does God, who makes whatever He wishes of the 26 letters and His stories work out just as well as Q-E-D as A-B-C.
The only people who believe in straight roads are generals and mail coach drivers.
A fish on the other hand, is not an easy thing to forge.
A fish is a slippery & three-dimensional monster that exists in all manner of curves, whose coloring & surface & translucent fins suggest the very reason and riddle of life.