Based on the true story of Genie (Katie, in the movie) who was kept strapped to a potty-chair and locked inside a cage by her father. I learned about her in Psychology class and developed an interest in Feral Children.
This book is really addictive and I really loved it, the rest of the series is also really good although it does drag out a little bitbut it was still really good <3
The 1891 'Celtic Fairy Tales' by Joseph Jacobs is an anthology that includes "Munachar and Manachar", the "Brewery of Eggshells", and "Fair, Brown and Trembling".