| Timetrap | |
| Author: | David Dvorkin |
| Pub Date: | 1988 |
| Isbn: | 0671648705 |
| Pages: | 221 |
| Series: | Star Trek |
| Release Number: | 40 |
| Publisher: | Pocket Books |
| Language: | English |
| Preceded By: | Time for Yesterday |
| Followed By: | The Three-Minute Universe |
Timetrap is an original-series Star Trek novel by David Dvorkin, published by Pocket Books in 1988. For the week of June 12, 1988, Timetrap was the fifth-best-selling paperback book on The New York Times Best Seller list. The novel originally sold for . Timetrap is Pocket's 40th numbered novel from the retronymed Star Trek: The Original Series. Simon & Schuster released an e-book version in September 2000.
The plot of the novel concerns Captain Kirk's kidnapping and brainwashing by Klingons to believe that he's time-traveled 100 years into his future. Ellen Cheeseman-Meyer, writing for Tor.com, described the story as dealing with the philosophy of perception and "drugs. Lots and lots of drugs."