The Efficiency Expert is a 1921 short novel by Edgar Rice Burroughs. One of a small number of Burroughs' novels set in contemporary America as opposed to a fantasy universe, The Efficiency Expert follows the adventures of Jimmy Torrance as he attempts to make a career for himself in 1921 Chicago. The book is remarkable for the criminal livelihoods of the hero's friends.

A native woman working in the little cultivated patch just outside the palisade which surrounded the mission was the first to see them. Her scream penetrated to the living room of the little thatched bungalow where the Rev. Sangamon Morton sat before a table. He had heard such screams before. The one thing always uppermost in his mind and the one, great, abiding terror of their lives there in the midst of the savage African jungle was the Wakandas....

The book begins with the introduction of your standard hero; Buck Mason, a straight talking straight shooting cowboy who has a problem with Ole Gunderstrom surrounding a land dispute that has been going on for 18 years. His visit is most likely not entirely about this dispute but more to garner information about Gunderstrom's daughter Olga who he sent out East for a proper education. Buck and Olga had been friends since childhood but Ole Gunderstrom...

Two schoolboys, Dick and Doc, are cousins who resemble each other because their mothers are twins. As Dick is also related to Tarzan through his father, they become known as the Tarzan Twins. Invited to visit Tarzan's African estate, they become lost in the jungle and are imprisoned by cannibals, from whom they escape. They are then reunited with their host, who introduces them to his pet lion, Jad-bal-ja. Subsequently, they become involved in an...

The opening passage of "Tarzan and the Tarzan Twins, with Jad-bal-ja, the Golden Lion" specifies that its events occur immediately after those of "The Tarzan Twins." In relation to other Tarzan stories, the two parts of the Tarzan Twins tale presumably fall between Tarzan and the Ant Men and Tarzan, Lord of the Jungle chronologically, as the initial part was published between these two novels.

Two separate search parties are looking for the lost ones without knowing the other has already found the ones they are seeking.

"The War Chief" is a realistic historical novel about life and death on an Apache reservation during the final years of the Apache wars until the death of Cochise and the surrender of Geronimo.

This story was originally entitled "The Quest of Tarzan". Tarzan is stranded on a Pacific island inhabited by the remnant of a lost Mayan civilization.

Elias Henders is the prosperous owner of a ranch and a gold mine. Competing for his daughter Diana, ranch hand Colby sabotages recovering alcoholic foreman Bull, and takes his job. The local stage is repeatedly robbed of gold bullion from the owner's mine, and Bull is suspected. The cowardly sheriff does not take action on the robberies. Rich Easterner Wainwright tries to buy the mine and ranch for a low price, but Henders refuses the offer and discusses...

A great safari had come to Africa to make a movie. It had struggled through the jungle in great ten-ton trucks, equipped with all the advantages of civilization. But now, it was halted, almost destroyed by the poisoned arrows of the savage Bansuto tribe. There was no way to return. And ahead lay the strange valley of diamonds, where hairy gorillas lived in their town of London on the Thames, ruled by King Henry the Eighth. Behind them came Tarzan...