Yes! I've finished the three-part Peel series! Peel's biographies are seen by many as the most complete and definitive account of Mary Baker Eddy's life. This is for good reason - Peel had some of the best access to documents regarding Mrs. Eddy, conducted some of the most thorough research, and had the most to say. While Peel is a Christian Scientist, non-Christian Scientists can enjoy these books.
I have read several other Mary Baker Eddy biographies, and feel these volumes, as well as the Gillian Gill tome, are in a class by themselves concerning the story of Mary Baker Eddy's life. Gill seems to be more concerned with the trials Mrs. Eddy had to face, especially the Next Friends suit. Neither have any glaring omissions, but Peel seems to focus more on Mrs. Eddy's vision of transforming her discovery of Christian Science into an international denomination and beyond. This makes sense - as a Christian Scientist, Peel is more concerned than Gill with the saga of Christian Science and how it is entwined with Mrs. Eddy's history.
While Peel may be slightly more sympathetic with Mrs. Eddy than Gill, neither one biographer provides a whitewash of her travails. While this is the most exciting volume of Peel's three volumes, I would not recommend one picking up the book right here. One would do much better to start at the beginning (The Years of Trial), slow as is may be. You'll enjoy it once it really starts to pick up.