Heart of Obsidian

As the first book in the Psy-Changeling series, this establishes the world of cold, emotionless Psy and passionate Changelings. It shares the same high-stakes world-building and the intense exploration of breaking through mental conditioning that defines Kaleb and Sahara's story.

Zsadist is a dark, tortured hero who, like Kaleb Krychek, has a horrific past and a singular obsession with the woman he loves. This book captures the same gritty, emotional intensity and the theme of a 'monster' being redeemed by a profound, soul-deep connection.

Mad Rogan is a high-level prime with immense power and a cold reputation, mirroring Kaleb's status as a Cardinal telekinetic. The series features a complex magic system, heavy political intrigue, and a slow-burn romance built on mutual respect and formidable power.

Also by Singh, this series features the same lyrical writing style and an equally powerful, morally ambiguous hero in Raphael. Fans of Kaleb's absolute devotion and the 'us against the world' mentality will find a similar dynamic between the archangel and Elena.

This book features a dark, competitive atmosphere and a hero whose lethal nature is balanced by his protective instincts toward the heroine. It echoes the high-stakes survival and the deep, obsessive bond found in Heart of Obsidian.

Rhysand, like Kaleb, is a powerful leader who has worn a mask of villainy to protect those he loves. The narrative focuses heavily on healing from trauma and the revelation of a long-standing, secret devotion that will resonate with Sahara and Kaleb fans.

This story offers a complex, slightly darker urban fantasy setting with a focus on internal power struggles and a protective, intense romance. It matches the atmospheric and psychological depth found in the Psy-Changeling world.

Set in a dystopian, steampunk London, this features a powerful, 'monstrous' hero who rules the underworld and a heroine trying to protect her family. The themes of social hierarchy and a dangerous, all-consuming love match Singh's tone.

While a contemporary romance, the hero is a cold, ruthless, and incredibly powerful man whose life is upended by his obsession with the heroine. It mirrors the 'alpha' intensity and the single-minded focus Kaleb Krychek is known for.

This series features powerful dragon-shifters living in secret among humans, dealing with internal politics and external threats. The hero's fierce protectiveness and the high-stakes action will appeal to those who enjoy the darker, more intense side of Singh's work.