This one’s getting the double-length treatment!
Underground Airlines is another alternative history that uses the Civil War as a fulcrum, but here the Civil War never actually took place, and the story is set in modern-day Indianapolis.
I won’t give away any more of the plot because I really enjoyed the twists, turns, and various details that are gradually presented throughout the story. But suffice it to say that although I enjoyed both these books, this one definitely engaged my interest more forcefully.
As with any book, there are a few weak points. Underground Airlines loses much of its flow in the last fifth of the book or so, and at the ending in particular. It’s not that I disagreed with what was happening, but I sensed a distinct shift in the quality of the world-building that was fleshed out so well in the earlier chapters of the book.
Despite those flaws, though, I’d wholeheartedly recommend this book. It was thought-provoking and entertaining, to boot.