This book seemed to be a lot about Emily Bronte's life based on her poetry and it is helpful to be familiar with it (along with Wuthering Heights).
It seemed hard for the author (Edward Chitham) to get close to Emily Bronte though. She seems to have kept many of her thoughts about daily life, and academic ideas close to herself.
Some of her ideas were controversial at the time, so this may well have been to have avoided arguments with her (surviving) sisters (Charlotte and Anne); also to have avoided being labeled in a derogatory manner.
There was also a brother, Branwell, whose behavior had to be guarded against, in order to keep the family peace. He was addicted to illicit substances, liked to drink too much and subsequently ran up debts.
Emily Bronte's parents were the Reverend Patrick Bronte and his wife, Maria Bronte (Branwell). Maria died early in the children's lives (1821) and this, plus an early schooling experience (Cowan Bridge) seems to have left a residue of sadness in the girls' lives.
Definitely inspires one to read Wuthering Heights again, also to read the poetry. The themes about Wuthering Heights were useful. Also, how the characters in Wuthering Heights evolved from Emily Bronte's earlier work. Again, it helps to have familiarity with Emily Bronte's childhood writing.
We are told that this work encompassess "the intense and absorbing feelings of childhood and early adolescence." Also that there is a focus on lonely, imprisoned and emotional children.
Themes include: 1.Nature, 2.Infidelity, 3.Separation/Reunion, 4.Duality, 5.Literary (Shelley - Epipsychidion - Horace - Ars Poetica, E.T.A. Hoffmann, Sir Walter Scott), 6. Oral - 1798 Rebellion in Ireland, family/founding.
There are also some useful pointers on Emily Bronte's religious views: "Charlotte was in the ultimate a Christian, and could not accept the nihilistic side of Emily."
I would like to see what Edward Chitham has to say about Wuthering Heights in his book about that book.