One well - known 'Gaslamp Fiction' book is 'The League of Extraordinary Gentlemen' by Alan Moore. It combines many famous fictional characters from Victorian literature in an exciting adventure.
Another great one is 'The Anubis Gates' by Tim Powers. It has time travel elements set in a gaslamp - lit London. The story is full of mystery and action, with a great mix of historical and fantastical elements. It's a really engaging read that showcases the essence of gaslamp fiction. There are also elements of magic and ancient Egyptian mythology woven into the plot, which makes it even more interesting.
I would also recommend 'Jonathan Strange & Mr Norrell' by Susanna Clarke. This book is set in an alternate version of 19th - century England. It's a long and detailed story about two magicians. The writing is very immersive, painting a vivid picture of the period with all its social hierarchies and superstitions. The magic in the story is unique and adds a lot to the gaslamp - fiction feel. It's a great example of how this genre can blend historical accuracy with elements of the extraordinary.