Worldwar: In The Balance
In 1994, Harry Turtledove decided to run with what can rationally and scientifically be called one of the most awesome fictional concepts ever: Aliens invade during World War II. The opening book, In The Balance, starts things off with a bang.
A group of lizard-aliens known only as “The Race” with juuust the right amount of technological balancing to make for a great story attack a humanity that’s stronger and more advanced than anticipated. While the issues Turtledove has with long series (pacing, repetition, etc…) appear even during this book, they’re not deal-breakers. And the weaknesses are more than made up for by the amazing first impression the book makes.
If you like alternate history, science fiction, World War II, or just strange concepts in general, this is worth checking out.
Fuldapocalypse Fiction 
I read that series when it came out. Most vivid memory was the deleterious effect of ginger, which was a drug to the little lizards, and the corrosive effect it had on their otherwise disciplined society.
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Loved this book! It was my introduction to Harry Turtledove, way back in high school. I blitzed through the first four novels, which were a high-octane thrill ride, and then petered out on the sequel series, which demonstrated Turtledove’s more typical languid, pointlessly repetitive style. Reading Bombs Away, Joe Steele, and the Southern Victory series showed that it only got worse from there.
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