This is the perfect book for those new to PKD's work or who have tried reading later, spaced-out novels such as "Valis" and given up. Counterfactual books, both fiction and non-fiction, are all the rage nowadays. So it is difficult when reading this book to remember that when it was published (in 1962, before the Vietnam War) the memories of World War II and the Korean War were still vivid. The premise is this: the Allies lost the war and the USA is split between the "Pacific States of America" in the West, run by the Japanese, and the East Coast, which is part of greater Germany (along with Europe and part of Asia). The background to how this came about is wonderfully teased out over the entire course of the book, and similarly the effects of Nazi rule over most of the globe are glimpsed in chilling off-hand remarks. PKD's world is well-thought out and comprehensive: while the "final solution" has been applied to the whole of Africa, Herbert von Karajan is resident as conductor-in-chief of the New York Philharmonic.
This is PKD's most mainstream, and in many ways his most approachable, published work. It is a wonderful analysis of how ordinary Americans might have behaved under totalitarian rule. There is a power vacuum created by the death of Martin Boorman, but the wider political picture remains a backdrop to the inter-connected stories of a selection of "average joes", all of whom are masterfully characterised. As a nod to the "science fiction" categorisation of the book, at the core of the tale is a bestselling, underground book written by a man who supposedly lives in a high castle in the Rockies, and which is a work of alternative history about how the Allies won the war - is it possible that reality could have been changed in some way? Intriguingly, even the alternative history presented in this book-within-a-book is substantially different to our own received history.
As ever with PKD, there are ambiguities everywhere and no definite resolution, not least to the identity of "the Man in the High Castle" and what his book represents. As previous reviewers have said, this novel examines ideas of oppression, colonialism, and the loss of cultural identity. It is a sometimes bleak work, but not without hope and some typical PKD black humour. This edition, with an insightful introduction, rightly presents the novel as a modern classic.