Alien Proliferation

Summary: I don't recommend it in general, but fans of the previous book in the serious, Aliens in the Family, should like this one too.

Alien Proliferation, by Gini Koch, is the fourth book in the Alien series.  I like the first one, Touched by an Alien, a lot.  It told the story of Kitty Katt, a marketing director who falls down a rabbit hole of gorgeous aliens, terrorist conspiracies, super-hero science, and witty banter.   For me, the first book was an enjoyable balancing act between the sublimely ridiculous world-building and plot twists, the cleverness of the dialog and characters, the comic-book action, and the warmth of the romance.  It's shallow and cheesy, but also sexy and fun.

Unfortunately, Koch lost the balance in the subsequent books.