Stratemeyer, Edward: Dave Porter on Cave Island. v1. 5 Sep 2014
 

Edward L. Stratemeyer (October 4, 1862 – May 10, 1930) was an American publisher and writer of children's fiction. He was one of the most prolific writers in the world, producing in excess of 1,300 books himself, selling in excess of 500 million copies, and created the well-known fictional-book series for juveniles including The Rover Boys, The Bobbsey Twins, Tom Swift, The Hardy Boys, and Nancy Drew series, among others.

Excerpt
In the present book we find Dave again at school. But the Christmas holidays are at hand and the lad returns home. Here a most mysterious and unlooked-for happening occurs, and Dave’s great benefactor, Mr. Wadsworth, is on the verge of ruin because of it. Dave gets a clew to the mystery, and, with his chums, resolves to investigate. He takes a long journey and has a number of stirring adventures, the particulars of which are given in the pages that follow.