A book, to be worth reading, must do more than amuse and interest. It must be instructive to be of real value to the reader. This book has a threefold purpose: First, it is an interesting romance. Second, it teaches a moral lesson and proves the natural laws laid down in the Bible. Third, it shows the value of science, foreknowledge, and preparedness. It has been well said that truth is stranger than fiction. This story is founded on facts and events, many of which have happened or will happen in the future. The "Tunnel Thru the Air" is mysterious and contains a valuable secret, clothed in veiled language. Some will find it the first time they read it, others will see it in the second reading, but the greatest number will find the hidden secret when they read it the third time.