I really enjoyed this - a superbly researched, in-depth look at one of my favourite writers. Although I've also read the one other biography on Shirley Jackson, I learned many new things about her. But it's a long, dense book, and I wonder if you would already need to be a fan of Jackson's work to sustain your interest?
Some minor quibbles: too long spent on the houses at the beginning, even though Franklin clearly identified houses as a theme in Jackson's work, and too long spent on Hyman (Jackson's husband) near the beginning. Obviously he was a huge influence on her, but there was a chapter or two where it seemed to be more about him than her.
However, highly recommended.
www.clairefuller.co.uk