Tom Swift And His Big Tunnel Or The Hidden City Of The Andes is written by Victor Appleton. The story begins with the Titus Brothers Contractors company has won a government contract in Peru to blast a tunnel through a mountain and connect two isolated railroad lines. The deadline is drawing near, and the contractors have literally run into a brick wall since the rock is too hard to blast using standard methods. Mr. Job Titus wants to engage Tom Swift to create a unique blasting powder to aid in completing the dig since he has heard of Tom Swift and his enormous cannon. Later on, the story comes with Mr. Damon, Tom's good friend, being invested in a business that procures cinchona bark from Peru but prompting Mr. Tom will be invited Damon to travel with him to Peru so they can find the problem's origin. In the end, Tom, Mr. Damon, and Koku, Tom's giant, embark on Peru and encounter Professor Swyington Bumper, who is on a lifelong quest to locate the lost city of Pelone. When Professor Bumper discovers that Tom is headed to the same general area, Rimac, he decides to join the company. To discover the whole story readers should read the book!