Tom Swift and His Aerial Warship is the 18th book in the original Tom Swift series.

Tom Swift and His Big Tunnel is the 19th book in the original Tom Swift series.

Tom Swift in the Land of Wonders is the 20th book in the original Tom Swift series.

Tom Swift and His War Tank is the 21st book in the original Tom Swift series.

Tom Swift and His Air Scout is the 22nd book in the original Tom Swift series.

Tom Swift and His Undersea Search is the 23rd book in the original Tom Swift series.

Tom Swift Among the Fire Fighters is the 24th book in the original Tom Swift series.

Tom Swift and His Electric Locomotive is 25th first book in the original Tom Swift series.