Recommended reading - The Third Figure, by Collin Wilcox (1968):

The Third Figure

By Collin Wilcox.

Published by Dodd, Mead.

First published 1968.

ASIN: B0006BUJVS

Description:

A mob boss is dead, and his widow wants Drake to help him rest in peace. Dominic Vennezio is found on the floor of his beachside love nest, murdered on a Sunday night. It looks like an ordinary mob hit, part of a routine power struggle with the East Coast Outfit, but Vennezio's widow has other suspicions. Her marriage to the kingpin had been strained ever since he began taking his secretary for weekends at the beach house, but even now, she feels a devotion to him. She wants justice for her husband – not just legal, but cosmic – and for cosmic justice, San Francisco can offer no better sleuth than Stephen Drake. A crime reporter with a clairvoyant streak, Drake's apprehensions about working for the mob are overcome by his sympathy for the noble widow. He starts his investigation in Los Angeles, talking to Vennezio's replacement, and sees immediately that it doesn't take a psychic to figure out that this job could be deadly.

Recommended reading - The Black Door, by Collin Wilcox (1967):

The Black Door

By Collin Wilcox.

ASIN: B0006BQEGW

Published by Dodd, Mead.

First published 1967.

ASIN: B0006BQEGW

Description:

A crime reporter with ESP tackles a double homicide. In a San Francisco apartment building, a young woman is found strangled beside a piano player with a broken neck. He's a nobody – a dreamer with little talent and no future – but she is Roberta Grinnel, daughter of one of the wealthiest men in the Bay Area. Stephen Drake, crime reporter for the "Sentinel," feels nothing when he looks at their corpses, and this is a troubling fact. For Drake is a psychic, and when his sixth sense fails him, that means more trouble ahead. As Drake tries to come to grips with his cosmic gift, the mystery of the heiress and the piano player becomes the hottest story in town. To keep his gig at the paper, Drake will call on every source he has – on this plane and the astral one – but knowing danger's lurking doesn't guarantee he can stay out of its way.

Born on this day – Collin Wilcox:

Collin Wilcox

Writer

September 21, 1924 – July 12, 1996

Credits:

Books:

A Death Before Dying (1990); Aftershock (1975); Bernhardt's Edge (1988); Calculated Risk (1995); Dark House, Dark Road (1982); Dead Aim (1971); Dead Center (1992); Doctor, Lawyer.... (1976); Except for the Bones (1991); Find Her a Grave (1993); Full Circle (1994); Hiding Place (1973); Hire a Hangman (1991); Long Way Down (1975); Mankiller (1980); McCloud (1973); Night Games (1986); Power Plays (1979); Silent Witness (1990); Spellbinder (1981); Stalking Horse (1982); Swallow's Fall (1987); Switchback (1993); The Black Door (1967); The Disappearance (1970); The Faceless Man (1975); The Lonely Hunter (1969); The New Mexico Connection (1974); The Pariah (1988); The Third Figure (1967); The Third Victim (1977); The Watcher (1978); Twospot (1978); Victims (1985).