This book may be useful for general readers as a background for the Birthday Letters poems, grounding each in the biographical facts of Plath and Hughes life together and providing reference points in an easy to read format, but it has many failings. Anyone who has read Anne Stevenson's Bitter Fame Plath biography will not need to read this book; it becomes obvious that Wagner's book was written using only three texts as research - Birthday Letters, Ariel, and Stevenson's book. It is a lazy reproduction of anothers argument, little more than a sixth formers essay. Anyone who has read the three books mentioned is wasting their money on this; every point it makes becomes obvious if you know the biography. Use it as a quick reference, not as a good book in it's own right.