The Three Roads, published in 1948, was the fourth novel by Kenneth Millar, and the final one using his real name before he started writing detective novels, ultimately using his later pseudonym, Ross Macdonald. In its use of psychological motifs and a Californian setting, The Three Roads anticipates Macdonald's later fiction.
The 1980 movie Deadly Companion (alternatively Double Negative) was based on this novel.[1]