This review contains spoilers.
There is little biographical information on Anne Brontë so Gérin is forced to make extensive use of her (Brontë's) poems and novels to provide a narrative of her life.
This approach is not one of which I usually approve, but I make an exception in this case, because Gérin makes the links between the author and the woman so skilfully and because, frankly, the book would be a very thin offering otherwise.
Gérin's biography was the first to treat Anne as an individual rather than merely as an appendage to her two elder sisters. And for this we should always be grateful to Gérin.