Rosa Prince has a great deal of admiration for Theresa May, and makes that quite clear in her book. While the second half really picked up pace, I found myself getting bogged down in some repetition in the first half.
This book's saving grace is that it provides a deep insight into who exactly Theresa May is. Upon completion, you'll feel like you know her—or, at least, what Prince wants you to think she's like.
The bias towards May in this biography is what most put me off from it. Prince's closes the book with "Yet through it all, with no real opposition to worry about, one thing is clear: the vicar's daughter remains in control." Reading this in 2019, that line (and several others) have not aged well.