 First US edition | |
| Author | Arthur Koestler |
|---|---|
| Language | English |
| Publisher | Hutchinson & Co (UK) Random House (US) |
Publication date | 1978 |
| Publication place | United States |
| Media type | |
| Pages | 354 |
| ISBN | 0-330-25842-7 |
Janus: A Summing Up is a 1978 book by Arthur Koestler, in which the author develops his philosophical idea of the holarchy. First introduced in Koestler's 1967 book, The Ghost in the Machine, the holarchy provides a coherent way of organizing knowledge and nature all together.