I read about a novel a few years ago that I never got around to reading and I'm trying to find the title. Don't know the author.
It was about a guy's girlfriend or ex-girlfriend somehow turning into a giant and rampaging through a city, and the guy has to also become giant to stop her. Pretty sure the giant woman was called Ruth.
The cover of the book had some giant legs on it.
Note, it was not 'Fifty Feet of Trouble'.
Enormity (2012) by W. G. Marshall?
From Goodreads:
Enormity is the strange tale of an American working in Korea, a lonely young man named Manny Lopes, who is not only physically small (in his own words, he's a “Creole shrimp”), but his work, his failed marriage, his race, all conspire to make him feel puny and insignificant-the proverbial ninety-eight-pound weakling.
Then one day an accident happens, a quantum explosion, and suddenly Manny awakens to discover that he is big-really big. In fact, Manny is enormous, a mile-high colossus! Now there's no stopping him: he's a one-man weapon of mass destruction. Yet he means well.
Enormity takes some odd turns, featuring characters like surfing gangbangers, elderly terrorists, and a North Korean assassin who thinks she's Dorothy from The Wizard of Oz. There's also sex, violence, and action galore, with the army throwing everything it has against the rampaging colossus that is Manny Lopes. But there's only one weapon that has any chance at all of stopping him: his wife.
The cover does have giant legs:
Chapter two is named "Manny and Ruth".
Found with the Google query scifi book girlfriend giant rampage site:goodreads.com/book.
