I felt I had to review here, if only to give a counter opinion to the one shown already.
I read Fleming's 'Barrow's Boys' a couple of years ago, and instantly considered it the best book in its genre I've ever read. Then I read his '90 Degrees North' and had to admit Barrow's Boys had competition.
This is more of the same from an excellent storyteller, and enthralling and funny throughout.
In this, as in his aforementioned titles, Fleming has the ability to make even those stories you already knew gripping. I'm an author myself (a writer of comedy books) and I find that Fleming's effortless humour has me chuckling at situations I doubt I've ever laughed at before.
He's made history fun, and I would recommend this book to anybody.