The Inheritance Games by Jennifer Lynn Barnes

"A BILLION-DOLLAR FORTUNE TO DIE FOR.
Avery has a plan: keep her head down, work hard for a better future. Then an eccentric billionaire dies, leaving her almost his entire fortune. And no one, least of all Avery, knows why.

A DEADLY GAME.
Now she must move into the mansion she's inherited.
It's filled with secrets and codes, and the old man's surviving relatives -
a family hell-bent on discovering why Avery got 'their' money.

WINNER TAKES ALL.
Soon she is caught in a deadly game that everyone in this strange family is playing.
But just how far will they go to keep their fortune?"

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Length: 400 pages

Published: 2020

Tropes: enemies-to-lovers, love triangle, rags-to-riches, found family

PLEASE BE AWARE ALL COPIES ARE SECOND-HAND AND CONDITIONS MAY VARY.