Victor Appleton 
Tom Swift in the Land of Wonders, or, The Underground Search for the Idol of Gold [EPUB ebook] 

Tom Swift in the Land of Wonders is a novel by Victor Appleton and is part of the "Tom Swift" series. The story follows Tom Swift as he embarks on an adventure to find the Idol of Gold, a valuable treasure said to be hidden underground in the Land of Wonders. With his friends and latest invention, a powerful airship, Tom sets out to solve the mystery and outwit rival treasure hunters. Along the way, he faces challenges and danger but remains determined to find the Idol and bring it back to civilization.