One of the greatest Books ever Written by Anybody

Truman Capote had this to say about a book by one of his favorite authors:
Truman: Have you read the fantastic book by J.R.Ackerly called My Dog Tulip?
Andy: No
Truman: Well its one of the greatest books ever written by anybody in the world.

From Truman Capote: Conversations

Punch magazine declared it the "first highbrow dog book ever written". Christopher Isherwood considers it one of the "greatest masterpieces of animal literature". Its a book that often makes the list of undiscovered jewels or little known works of literature.

This contrasts with another more widely known masterpiece of animal literature-
Call of the Wild by Jack London. The books dark tone however like the more eccentric relationship detailed in Ackerly's book are examples of 'adult' animal tales that have since disappeared from the literary scene in more recent times.