World Killers, the penultimate volume of the Robotech: Sentinels series, takes the mix-and-matched Sentinels to Haydon IV and Spheris to eradicate Invid presence on both planets. Along the way, one of the prisoners of war - an Invid scientist named Tesla - slowly becomes more powerful as he ingests fruit from each planet visited by the Sentinels. Meanwhile, T.R. Edwards continues his plot against Rick and Lisa Hunter - and all of the universe - in a style reminiscent of Herbert's Dune.

Much like the rest of the series, World Killers provides an exciting adventure in a universe fleshed-out through both the writing styles (the epigraphs, specifically) and the character and race development. Each of the extraterrestrial species is unique and interesting, as is each planet visited and subsequently freed by the Sentinels. This volume in particular elicits strong feelings across the gamut of human emotion. Karen Penn and Jack Baker are also very similar to a certain Rick and Lisa Hunter from years before (from the original six Robotech volumes).

This, in conjunction with the rest of the Sentinels series is a must-read for any fan of Robotech, and is interesting and entertaining enough to even draw in casual Science-Fiction fans. ( )