Interstellar Pig - William Sleator
This is a young adult sci-fi novel that I first read in junior high, probably. It was brought back to my attention recently because I heard that William Sleator (who is apparently still writing young adult fiction) published a sequel to it just last year. The book is about Barney, a teenager on vacation with his parents, three people who show up renting the cabin next door, and Interstellar Pig, a game that all three seem obsessed with. Of course, being a sci-fi novel, the game ends up being more than just a game, and the three neighbors (who don't seem to speak English perfectly) turn out to be a little more than just tourists. I couldn't remember if the book was as obvious the first time I read it; possibly it's written in such a way that young adults can feel really clever because they've figured things out quicker than Barney. On the other hand, it's quite possible that younger readers might not pick up on all of the hints. At any rate, it was still entertaining and now I'm all set to read the sequel, Parasite Pig.