The Pier Falls, book review. (Mark Haddon)

Like a lot of you bibliophiles out there, I first heard of Mark Haddon when he wrote his hugely acclaimed Dog in the Night time novel, and very good it is too. He's subsequently written two more novels and now this, his first collection of short stories. 
This book was a present from a woman at work and I'm glad she bought it for me, because I rarely read short stories (even though I write them!), so it might have passed me by if I'd been left to my own devises. 
I read this book in no particular order, which was probably the wrong thing to do, (I imagine the author and publisher spent many an hour deliberating over what should go where), but so be it.  
The Pier Falls is the first story in the book and it is excellent. It has a great sense of prose, and puts the reader right there, in the middle of a collapsing pier. It is also quite horrific in the way a disaster like that would be, so a good start.
The Gun, this is about two teenagers who take a gun from one of their brother's bedrooms, and fire it in the local wood, was interesting, but that's about it.
There's an expedition to the Amazon, which I quite liked, a story about a seriously obese man, which was okay, a failed expedition to Mars, which was one of the high points in the book, being almost as good as the title story, but then it falls a bit flat.
The one that really got my goat was the weirdly titled, 'Wodwo'.
This and the rather lacklustre 'Breathe' were the low points in the book, the point where I began to wonder, what the hell! I wondered (and still do) whether Wodwo was supposed to be supernatural, or real? Did it have a hidden meaning? (because if it did, I didn't get it). I'm still at a complete loss as to how a man can be shot at point blank range with a shotgun, get up and come back the following year!!!! It was just soooooo strange. (To add insult to injury, it was also the longest story in the book). Arrrgggg!!!
Without Wodwo, Breathe and Bunny, I would have offered this book four stars, but with Wodwo sitting there, right in the middle of the book, spoiling it all (in my opinion), it only gets three. 
Stupidly, I don't read as many short stories as I should, so credit to Mark Haddon and his team for getting these out there. 
I await his next novel with much anticipation.