&sq=Qlik&lang=&file=File:I-Know-What-You-Did-Last-Summer-Book-Cover.png) First edition cover | |
| Author | Lois Duncan |
|---|---|
| Language | English |
| Genre | Young adult fiction, thriller |
| Published | October 1973 |
| Publisher | Little Brown |
| Publication place | United States |
| Media type | Print (hardcover & paperback) |
| Pages | 199 (first edition, hardback) |
| ISBN | 0-316-19546-4 (first edition, hardback) |
| OCLC | 640901 |
| LC Class | PZ7.D9117 Iak |
I Know What You Did Last Summer is a 1973 suspense novel for young adults by Lois Duncan. A film adaptation loosely based on the novel was released in 1997.