The Story of the Amulet by Edith Nesbit

Novel for children. According to Wikipedia: Edith Nesbit (married name Edith Bland; 15 August 1858 – 4 May 1924) was an English author and poet whose childrens works were published under the name of E. Nesbit. She wrote or collaborated on over 60 books of fiction for children, several of which have been adapted for film and television. She was also a political activist and co-founded the Fabian Society, a precursor to the modern Labour Party.... Nesbit published approximately 40 books for children, both novels and collections of stories. Collaborating with others, she published almost as many more. According to her biographer Julia Briggs, Nesbit was the first modern writer for children: (Nesbit) helped to reverse the great tradition of childrens literature inaugurated by [Lewis] Carroll, [George] MacDonald and Kenneth Grahame, in turning away from their secondary worlds to the tough truths to be won from encounters with things-as-they-are, previously the province of adult novels. Briggs also credits Nesbit with having invented the childrens adventure story. Among Nesbits best-known books are The Story of the Treasure Seekers (1898) and The Wouldbegoods (1899), which both recount stories about the Bastables, a middle class family that has fallen on relatively hard times. Her childrens writing also included numerous plays and collections of verse. She created an innovative body of work that combined realistic, contemporary children in real-world settings with magical objects and adventures and sometimes travel to fantastic worlds.