The Swifts by Beth Lincoln

On the day they are born, each Swift is brought before the sacred Family Dictionary. They are given a name and a definition, and it is assumed they will grow up to match. Unfortunately, Shenanigan Swift has other ideas. So what if her relatives all think she’s destined to turn out as a troublemaker, just because of her name? Shenanigan knows she can be whatever she wants – pirate, explorer or even detective. Which is lucky, really, because when one of the Family tries to murder Arch-Aunt Schadenfreude, someone has to work out whodunit. With the help of her sisters and cousin, Shenanigan grudgingly takes on the case, but more murders, a hidden treasure and an awful lot of suspects make things seriously complicated. Can Shenanigan catch the killer before the whole household is picked off?