I had previously read Ripper, Leviathan, and Carpathian, so I’m familiar with the series, even though I’m reading it out of order. Since some of the novels—and this one in particular—mention and depend on actions that happened in the earlier books, I think it would be best to read the series in order. The idea of the Event Group, or Department 5656, is intriguing—a secret government office dedicated to studying the mysteries of history and how those mysteries affect modern life. The characters are engaging, with lively banter and a range of motivations and personalities. In this book, aliens arrive and start wreaking absolute havoc. Luckily, the Event Group has some prior knowledge of how to contend with the threat, thanks to a specific character from an earlier novel, whom they’ve kept at the Group’s location in Nevada. However, there’s a plot hatched within a different government agency to discover and kill this specific character. There’s a lot going on, most of it exciting and fast-paced. In any alien invasion book, the author must come up with a plausible reason for extraterrestrials to travel so far to attain Earth as a prize. Mr. Golemon does give his aliens a reason, but I just can’t buy it, so that detracted from my enjoyment. He gets some of the physics wrong as well, such as having shock waves in space. Still, for action-packed excitement, I give Overlord four stars.