|Completely Unexpected Tales by Roald Dahl|
(my own photo)
It turned out to be a bit of both. While his stories do contain the fantastical elements of his children's books, they are definitely aimed at adults.
This book is a collection of short stories, and they are full of really dark humour, which I enjoy, but it also contained some really interesting premises and ideas.
They were nice, relaxing reading, and the stories covered varying themes and time periods. The stories were a good length; long enough to develop the characters and plot without being long-winded.
By calling the collection "Completely Unexpected Tales", it encouraged me to expect the unexpected. I was always thinking ahead, and trying to figure out what the twist at the end was. So, ironically enough, I managed to guess the twists in most of the stories, so they weren't really unexpected at all.
However, there is a unexpected surprise for all Harry Potter fans.
Chances of finding it in my imaginary bookstore: 75%