Sand was the most popular writer (of any gender) in Europe by the age of 27, more popular than both Victor Hugo and Honoré de Balzac in England in the 1830s and 1840s, and she remained immensely popular as a writer throughout her lifetime and long after her death. Early in her career, her work was in high demand; by 1836, the first of several compendia of her writings was published in 24 volumes. In total, four separate editions of her "Complete Works" were published during her lifetime. In 1880 her children sold the rights to her literary estate for 125,000 Francs (equivalent to 36 kg worth of gold, or 1.3 million dollars in 2015 USD).