popular ! The Four Winds, by Kristin Hannah

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Texas, 1921. A time of abundance. The terrific War is over, the bounty of the land is plentiful, and America is on the brink of a newly-released and optimistic era. But for Elsa Wolcott, deemed too old to marry in a time when marriage is a woman's only option, the future seems bleak. Until the night she meets Rafe Martinelli and decides to change the direction of her life. With her reputation in ruin, there is only one respectable choice: marriage to a man she barely knows.
By 1934, the world has changed; millions are out of work and drought has devastated the splendid Plains. Everything on the Martinelli farm is dying, including Elsa's tenuous marriage; each day is a desperate battle against nature and a fight to keep her children alive.
In this uncertain and perilous time, Elsa--prefer so many of her neighbors--must make an agonizing choice: fight for the land she loves or leave it behind and go west, to California, in search of a better life for her family.