First, a note about the series proper: The novels in the series are all in the same shared universe, but generally follow different characters in each novel. Sometimes characters return in another book, and sometimes there are mini-series in the overarching narrative. There's action, intrigue, romance, all the stuff you'd want out of a book. Not to mention that men are men and women are women, and nobody's shy about that. Dangerhairs would hate them, I'm sure.
The book I'm currently on is Moonrise, number three or four in release order. The "first" book, Privateers, was written before the collapse of the USSR, so it has Soviets trying to take over all space operations; events from the book seem to be referenced later on, but Bova never specified if it was still canon to the series, and later books just have them replaced with Russians. Hence, this is third or fourth. Anyway, the general plot of Moonrise revolves around the first permanent lunar colony and the struggles to both get it operational and keep it from being shut down.
So one common thread among these novels is a strong male lead, very gung-ho about space exploration. Moonrise opens with the lead character having barely survived an attempt on his life through rogue nanomachines, struggling across the lunar surface to reach safety before his air gives out, determined to get back to Earth and get revenge on the man who tried to kill him. The first part of the book is this narrative interspersed with the events that led there, until the prelude finally catches up and shows the murder attempt, just as the present-time character gets to a shelter to regroup.
And then, just as he's about to make it back to Moonbase, it turns out that he wasn't safe after all, and the nanomachines were just dormant until they reactivated and began to eat through his suit. Realizing he'd only destroy Moonbase and kill everyone inside if he tried to go any further, he sends out a message not to come near, tells his wife he loves her, then cracks the seal on his helmet before the nanomachines can devour him painfully.
I only just finished the first part so I'm don't know yet who the protagonist will be from here on, but I found that subversion interesting. You think that you're gonna follow this protagonist in the mold of the other novels' main characters, up to the point where he makes a heroic trek to reach safety and begin his revenge, and then bam, struck down at the last minute. I'm definitely interested to see what comes next, and it just goes to show what a talented author can do with a subversion.