The Dictionary of Lost Words by Pip Williams
"Set in the early 1900s, this story tells the untold story of how the Oxford dictionary came to be, particularly of the words that were decidedly left out. A young girl, Esmé, becomes fascinated with words and their meaning, her curiosity blossoming from her discovery of the word “bondmaid.” As Esmé contemplates the meaning of the word and it’s significance, she is also puzzled as to why it was discarded and not included in the dictionary.