 First book edition | |
| Author | Hal Clement |
|---|---|
| Cover artist | Paul Lehr[1] |
| Language | English |
| Series | Mesklin |
| Genre | Science fiction |
| Publisher | Ballantine Books |
Publication date | July 1964 |
| Publication place | United States |
| Media type | Print (magazine, hardback and paperback) |
| Pages | 190 (paperback) |
| Preceded by | Mission of Gravity |
| Followed by | Star Light |
Close to Critical is a science fiction novel by American writer Hal Clement. The novel was first serialized in three parts and published in Astounding Science Fiction magazine in 1958. Its first hardcover book publication was in July 1964.