There were three book titles made up by Dr. Boli in yesterday’s literary puzzle:

The Unicycle Boys’ Great Mustard-Gas Adventure

The All Right Boys at the World’s Fair

The Railroad Boys in the Outback

All the rest are real books that were published by real publishers, and every one of them can now be found at Project Gutenberg. If you know a boy with an ebook reader, you know now what to tell him.

The Motor Boys Overland
The Brighton Boys in the Trenches
Motor Boat Boys’ River Chase
The Go Ahead Boys and the Mysterious Old House
The Iron Boys on the Ore Boats
The Ranger Boys Outwit the Timber Thieves
The Radio Boys on Secret Service Duty
The Bungalow Boys Along the Yukon
The River Motor Boat Boys on the St. Lawrence
The Auto Boys’ Quest
The Boy Aviators’ Flight for a Fortune

Although these are all real titles, as you can verify by following the links yourself, Dr. Boli might as well confess that he wishes he had made up The River Motor Boat Boys on the St. Lawrence and The Iron Boys on the Ore Boats.