Plot summary:

The novel concerns the adventures of Leon of Atrax, a Thessalian cavalry commander who has been tasked by Alexander the Great to bring an elephant captured from the Indian ruler Porus, to Athens as a present for Alexander's old tutor, Aristotle. Leading a motley crew that includes an Indian elephantarch to care for the creature, a Persian warrior, a Syrian sutler and a Greek philosopher, Leon sets out to cross the whole of the ancient known world from the Indus River to Athens.

The journey is long and adventurous, involving frequent skirmishes with bandits, unruly noblemen, Macedonian commanders with ideas of their own about who's in charge, and a runaway Persian noblewoman. It doesn't help that the goal of the whole enterprise is essentially a malicious prank concocted by Alexander on his former teacher: he gifts Aristotle with the elephant but no funds for its upkeep, while sending the funds (but no elephant) to the savant's arch-rival Xenocrates.

The story is founded on the fact that Aristotle's writings include an apparently eye-witness description of an Indian elephant, though the circumstances under which he might have come into contact with such an animal are unknown.

Reception:

Contemporary reviews of the novel were favorable. The Chicago Daily Tribune called it "an amazing narrative vehicle for the display of ... a fairly complete composite of the life and times of which the author writes" and praised its "ever-freshly welling vein of humor." The New York Times called it an "engaging new historical novel," and stated that "by hybridizing a Middle-Eastern travelogue with an Alexandrine comedy of manners, the author has produced a specimen only slightly less rare then elephants in Westchester–to wit, a historical novel with a sense of humor." It highlighted de Camp's endowment of each his various characters "with a particular modern accent or dialect" to "differentiate the multitude of nationalities in Alexander's empire," noting that the device "adds to the entertainment." The Washington Post called it an "engaging new novel," and pronounced that "if all books on ancient history were written with the free-flowing grace of An Elephant for Aristotle, many more of us would have an appreciation of the civilizations that came before ours." It stated the author "has given this historical novel a different treatment–one which scrupulously tries to respect historical fact but doesn't take itself too seriously–the change is all for the better."