Vietnam and South America are both off my patch when it comes to reading, I'm afraid. Years ago I had a brief dabble with Gabriel Garcia Marquez and the like before realizing that I strongly dislike magic realism.
Read:
The Diet Myth: The Real Science Behind What We Eat, by TD Spector.
Really enjoyed this - written by an expert with genuine scientific credentials rather than someone trying to sell you their diet. Two people can eat the same things, and their bodies will react differently. Why? It seems to be down to the interaction between their genes and the microbes in their guts. There's a strong association between global overuse of antibiotics (in farming as well as human medicine) and the increase in obesity, and the mechanism seems to be that antibiotics are damaging the microbes in our gut that are good for us. We're still at a very early stage of understanding the mechanisms. The ideal diet for each of us will be individual, based on our own microbial make-up, but there is some general advice about how to encourage the right kind of environment in your gut (cheese from unpasteurised milk, eating a very diverse diet, lots of fruit and veg, and shaking things up every now and then through fasting, or eating meat if you're a veggie/abstaining from meat if you eat it a lot).
It gives you all the science but it's also an entertaining read, with various personal anecdotes (he's scathing about the earliest research papers he published, which is refreshing) and case-studies.
Mad Girl, Bryony Gordon
In the vein of Matt Haig's Reasons to Stay Alive - her account of living with OCD and associated problems (drug abuse, bulimia etc). She manages to write lightly and engagingly about her problems, without making you doubt the devastating impact on her life. I read her earlier memoir of her wild 20s, The Wrong Knickers, and while I found it readable (it has been widely compared to Bridget Jones), I found the happy ending a bit glib. Here she shows the shadow side, including the impact of her mental health on her marriage and her pregnancy/early motherhood.
I thought it was a great read, and it has increased my compassion for someone trying to battle against constant intrusive thoughts and the like. I'll admit that I sometimes feel people would be able to get better if they only tried hard enough, so this was a valuable insight into what it feels like.