The Ruling Class by Jennifer Lynn Barnes

When Tess Kendrick is sent to stay with her older sister in Washington, D.C. she has no idea that Ivy is the Capitol’s go-to “fixer,” a person who can make powerful people’s scandals disappear with a snap of her fingers. Tess never thought she and Ivy had much in common, but when she enrolls at the exclusive Hardwicke School, she soon finds herself thrust into the role of high school fixer, solving problems for the children of the D.C. elite.

Secrets pile up as each sister lives a double life, and their worlds come crashing together when a scandal from the halls of Hardwicke reaches Capitol Hill. As the stakes turn deadly, Tess must uncover who’s behind the power play before she becomes a target herself.

Previously published as The Fixer.