The Young Lady is a Reborn Assassin: Opening Salvo - The Young Lady is a Reborn Assassin, #1

Jensen Weller was the world's most infamous professional killer - a shadow in the night who stuck fear in the hearts of politicians, businessmen and terrorists alike. Living life under fire, he always knew that one day his number would come up. After finally falling during an intense gunfight, he awakens to find himself trapped inside the body of another, that of a teenage girl named Maria Walston-Carter.
Now afflicted with an extreme compulsion to laugh boisterously at the drop of a hat, she must attend the nation's most prestigious boarding school and do her noble family proud. What initially seems to be a peaceful existence in a magical world soon proves to be anything but. Jensen's skills as an assassin aren't ready to be put away just yet. The popular action-comedy-reincarnation adventure is now available in this single volume!