Emily Feather and the Starlit Staircase

Emily Feather is an ordinary girl in an extraordinary family of fairies.
When Emily finds out her adopted mother is pregnant, she
can’t help feeling upset. This means there will be another brother
or sister who will actually belong, unlike her. They will also
be a fairy and have magical powers. Then her brother, Robin, takes
Emily through one of the enchanted doors to show her a magical
alternative life, that might have been had Emily not become part
of their family.