Victor Appleton 
Tom Swift Among the Diamond Makers, or, The Secret of Phantom Mountain [EPUB ebook] 

The book "Tom Swift Among the Diamond Makers" is part of the "Tom Swift" series written by Victor Appleton. In this adventure, Tom Swift sets out to find the secret of Phantom Mountain where it is rumored that diamonds are made. With his scientific knowledge and technological expertise, Tom embarks on a dangerous journey to uncover the truth behind the rumors and find the valuable diamond cache. Through thrilling twists and turns, Tom faces many challenges and obstacles but eventually succeeds in uncovering the mystery of Phantom Mountain.