"Welcome to Badassery 101. I'm Max Ahlgren, your instructor. There is one required textbook for the class: Nexus."
Nexus is book four in the explosive Crucible series, penned by Ryan Aslesen, who is quickly proving himself to be a master writer in the military sf genre. I would recommend reading the other superb books in the series before tackling Nexus, so you can get the full narrative that leads up to Nexus.
Still on the hunt for his family's killers, alpha male stud muffin Max Ahlgren will not rest until the perps are six feet under. After a shocking turn of events at the end of Apex, Max is more determined than ever to track down the abhorrent Swift Carter. When an old buddy from the Corps reveals to Max that he can get some info on Carter, Max jumps at the opportunity--but there's a catch, of course. Max must escort a brilliant programmer, his son, and a revolutionary A.I. program to safety. His only assistance is from a rookie FBI agent, and beyond her, he can trust no one. What follows is a tale that only the crafty Ryan Aslesen could concoct, one of breathless action and cutting edge technology.
Nexus is much more of a conventional thriller than the previous books in the series. The tale hearkens back to classic cat and mouse spy novels, such as those by Robert Ludlum. Rather than horrifying aliens or zombies, Max gets to fend off shadowy agents, take part in car chases, and do some detective work this time around. It's a nice change up to the series, but I do hope the raw thrills that Aslesen nailed so well in the earlier books make a comeback down the road. The plot device of Max having to tackle missions to find out info on his family's killers is getting a little worn, but Nexus changes up things enough in other ways that it still feels fresh. I particularly enjoyed the change in scenery in the book. How you can you say no to a wild car chase down the Vegas strip? As always, Aslesen writes action scenes that are breathless and manic. Nexus is a nitro-charged V-12 engine that never runs out of gears--and forget about brakes! The book is very well written, with great description and believable use of real equipment, from firearms to tactical gear. There is also some interesting and thought-provoking technology presented in the book that take it in a sci-fi direction. And a well-deserved shout out to that dream sequence; psychedelic, dude!
Characterization is one element that, while excellent in the series as whole, still continues to improve. Aslesen continues to mold Max Ahlgren into a protagonist for the ages. The author delves into the compelling psyche of rage like a virtuoso psychologist. Max is a study in anger and revenge, but coupled with scruples and morals make him a tragic and relatable character. I suspect you'll find some of the author in Max; it's tough to write a character so well unless you've been there yourself.
Ok, I'll shut up, already! Read it. You'll like it. Welcome to the razor's edge of military sf. 'Nuff said.