Parini successfully achieves that delicate equilibrium which results in a remarkable biography. He portrays the subject as a human being, making him relatable and accessible, while still maintaining the respect and a retrospective hint of mythology associated with the figure, without being overly sycophantic.
Parini vividly depicts Frost's public persona and beautifully describes how it was formed. He also makes some quite informed speculations (which is all any of us can do) about the real person hidden beneath the mask.
Since Parini is a poet himself, he is able to gain some insights into Frost's mind through his poetry. I must admit that my least favorite aspect of Parini's biography was his analysis of some of Frost's poems. However, fortunately, he does this sparingly and devotes most of his efforts to understanding Frost's life.
I had no inkling that Frost endured so much darkness and illness throughout his life. It is truly astonishing that such experiences could give rise to such magnificent and meaningful poetry.
It is especially a delight to read as a fellow New Englander who can identify many of the places and motifs that permeated Frost's poetry.