Physics in fiction

Despite its cheesy cover, I really enjoyed William Sleator's Singularity (PB SLE):



While house-sitting their great-uncle's deserted farm, twin brothers discover a secret in the locked shed on the property. (Warning, bit of a spoiler here) It's a singularity, a space where, for every hour that passes, only a second goes by in the outside world. What's worse, something menacing is coming up through the sink, something that surely comes from another universe. Take these circumstances and throw in a healthy dose of sibling rivalry, and you get a real page-turner.