Start with high-confidence bridge engineering books, then narrow by subgenre or adjacent topics.
The Great Bridge
David McCullough
Bridging the Mississippi
Philip Gould, Margot H. Hasha
Crossing Under the Hudson
Angus Kress Gillespie
The St. Lawrence Seaway and Power Project
Claire Puccia Parham
Design of Highway Bridges
Richard M. Barker, Jay A. Puckett