Villainous. The White Knight & Black Valentine Series, #2

A supervillain never really retires... Valentina Belmonte isn't evil anymore-honest. She's hung up her supervillain costume, retired to Florida with her family, and hasn't committed a crime in years. (Well, not a felony. What's a misdemeanor here and there if you don't get caught?) This time, she's not the one in trouble with the law-her goody-two-shoes, former superhero of a husband is. He saved her life two months ago but committed a spectacular amount of assault and property damage along the way.
The feds plan to press charges...unless Val does something for them in exchange. Apparently, an old friend of hers is importing a deadly drug that gives people temporary psychic powers. The feds want to send in Val with a wire to get evidence to bring him down. Sounds simple enough, but things turn deadly fast, and Val finds herself up against another supervillain-one who can out-play her at her own game.
Val's worried she's gone soft since retirement, but if she doesn't get the feds the evidence they need, her husband will end up rotting in one of the most hellish prisons in the country... If you find villains more interesting than heroes, enjoy morally-ambiguous female protagonists, or just like books with a lot of action, then Villainous is for you. Download it now!