Start with high-confidence 19th century history books, then narrow by subgenre or adjacent topics.
Century of the Scottish People: 1830–1950
T. C. Smout
From Dawn to Decadence: 1500 to the Present
Jacques Barzun
Fallen Idols
Alex von Tunzelmann
Love in the Time of Victoria
Francoise Barret-Ducrocq, John Howe
The Dawn Watch
Maya Jasanoff
The Industrial Revolution
Laura L. Frader
The Emergence of the Modern Museum
Jonah Siegel
The Novel of the Century
David Bellos
The Age of Empires
Robert Aldrich
Bury the Chains
Adam Hochschild
The Civil Wars in Britain and Ireland
Martyn Bennett
The Brutish Museums
Dan Hicks
Loot
Barnaby Phillips
Edge of Empire
A Tale of Two Cities
Charles Dickens
After Barbary
Timothy Mason Roberts
A New World Begins
Jeremy Popkin, Jeremy D. Popkin
From Eve to Dawn, a History of Women in the World, Volume III
Marilyn French, Margaret Atwood
The London Hanged
Peter Linebaugh