'On The Beach' was published in the 1950s. It's dated, but still a very good read and I prefer it to the film. For an overview of the Vietnam war, from beginning to end in one volume, I like 'Vietnam' (Max Hastings) and for a very different approach '365 Days' (Ronald Glasser).
I'm currently reading 'The Promise' (Damon Galgut) and 'Angels of Mercy' (Chris Schoeman). The first is fiction, about a family in South Africa and the tensions that arise from their failure to make good on a promise given by a dying woman to her African maid/servant. I've just started it, and it's intriguing. The second is about the role of foreign women in the Anglo-Boer War 0f 1899 - 1902 and is mainly about the nursing services.
I have a lot of books, mostly non-fiction, and my main interests are history and particularly military history with a focus on the Anglo-Zulu and Anglo-Boer Wars (I've been to most of the battlefields). My wife is getting a bit miffed about the amount of space the books take up though. She uses a Kindle and suggests I get one, but I just can't get on with them.