Book: Out of the Dark
Author: David Weber
David Weber is a predominately military science fiction writer whose most well known books are the Honor Harrington series, and associated novels and short stories set in the same universe, the "Honorverse."
Out of the Dark is a new novel based around an alien invasion of Earth set in the near future.
The original scouts for the Hegemony were horrified by what they saw when they first came to Earth. This was in 1415, and the Battle of Agincourt in which Henry V of England destroyed a superior French force led by Constable Charles d'Albret was what they observed. The scouts were peaceful herbivores, and such bloodshed was anathema to them.
The book revolves around several major characters, some of whom have lost much in the initial kinetic bombardment, as they fight against the Shongari invaders. Up to now, the story is pretty standard fare.
Stories about aliens invading Earth are hardly new in science fiction. H.G. Wells' War of the Worlds was not only one of the earliest science fiction books - it actually pre-dates the genre - but also one of the first books featuring aliens attempting to conquer Earth. The concept has been very popular in all forms of science fiction since.
The aliens finding the actual conquest rather harder than they initially expected is also not uncommon, with humans refusing to admit they have been defeated. Humans also proving to be more technologically advanced than expected has been used before.
Where the difference lies is in the "twist." This isn't a unique twist, but I know of only one other alien invasion story with a similar twist, although a different execution. It is possible to figure the twist out, especially if you read the promotional blurb on the back of the book, and have some related knowledge, so no precise mention of the information that allows this to be deduced will be made. Avoiding reading the blurb on the back of the book, or in promotional writings, will help prevent this twist being realised too early in the book. The twist provides an unexpected slant on the overall story.
Without this twist, there is nothing really to make the Out of the Dark stand out from the many similar books of this type. It's a good enough read anyway, if you enjoy this type of story, but it's the twist that makes it stand out from the rest.