The soldiers in the CBI theater faced the most harsh conditions , comparable to any others in any war, in my opinion. They were constantly battling weather and disease as well as the enemy. Every one of these men were ultimate warriors and heroes to be remembered and commended, including the author of this book, Michael ('Mad Mike') Calvert.
However and unfortunately, the book needed a co-writer. There is no narrative at all in the book that can possibly be followed by the average reader.
As an alternative to this book about the Chindits, there is 'The Marauders', by Charlton Ogburn. If you have interest in CBI, Ogburn's book is quite good and rewarding.