Civil engineers
Free to read here, from Project Gutenberg.
Alexander's Bridge
Autobiography of Sir John Rennie, F.R.S., Past President of the Institute of Civil Engineers
John Bull's Other Island
The City of Numbered Days
The Hallowell Partnership
The King of Arcadia
The Life of Thomas Telford, Civil Engineer
Dave Porter's Great Search; Or, The Perils of a Young Civil Engineer
Life of Robert Stevenson, Civil Engineer
The Young Engineers in Colorado; Or, At Railroad Building in Earnest
Dave Porter and His Double; Or, The Disapperarance of the Basswood Fortune
Web of steel
The Young Engineers in Arizona; or, Laying Tracks on the Man-killer Quicksand
The Young Engineers in Nevada; Or, Seeking Fortune on the Turn of a Pick
David Vallory
The Young Engineers in Mexico; Or, Fighting the Mine Swindlers