Heirs working for their inheritance

Has anyone read an awesome story/book about heirs who are put to the test in order to receive an inheritance?

Brewster’s Millions - The plot concerns a young man whose grandfather leaves him $1 million in a will, but a competing will from another relative requires he must spend the $1 million in the first year or forfeit a $7 million inheritance from the other relative.

Montana Sky - Nora Roberts

Three sisters (by different ex-wives) inherit their late father's ranch, which only the youngest lived on. They have to live there together for a year in order to inherit.

These may have some elements of it:
Tuesday Mooney Talks to Ghosts
The Parker Inheritance
The Maze of Bones
The Shadow Cipher
Click Here to Start

ETA:
The House of a Thousand Candles
The Mystery of the Dead Man's Riddle
The Inheritance Games

For fairytale antecedents: The White Cat: An Old French Fairy Tale

Oh, and of course there is Charlie and the Chocolate Factory

It sounds like Ready Player One also takes that tack.

I must have discarded it; can’t find it.
A great uncle promises his estate to the cousin that produces the most children in the next decade.

Jennifer Lynn Barnes did a ya series (thriller, romantic, teen) called the inheritance games. The premise of the 1st book is very westing game

Regency romance from Heyer - Cotillion

Jill Churchill's Grace and Favor series is about siblings who must live in their great-uncle's "cottage" for 10 years to claim their full inheritance.

I was supposed to get the 7th book in the series through early reviewers but it never arrived. I don't think it was ever published. The 6 previous books in the series are enjoyable, though.

Sounds great, thank you!

>3 tealadytoo: Thank you!

>5 Aquila: Great leads, thank you!