The Blue Castle is a 1926 novel by Canadian author Lucy Maud Montgomery, best known for her novel Anne of Green Gables (1908).
The story takes place prior to World War I in the fictional town of Deerwood, located in the Muskoka region of Ontario, Canada. Deerwood is based on Bala, Ontario, which Montgomery visited in 1922. Maps of the two towns show similarities.
Valancy Stirling is 29 and has never been in love. She's spent her entire life on a quiet little street in an ugly little house and never dared to contradict her domineering mother and her unforgiving aunt. But one day she receives a shocking, life-altering letter―and decides then and there that everything needs to change. For the first time in her life, she does exactly what she wants to and says exactly what she feels.
At first her family thinks she's gone around the bend. But soon Valancy discovers more surprises and adventure than she ever thought possible. She also finds her one true love and the real-life version of the Blue Castle that she was sure only existed in her dreams...