Haller, a Los Angeles–based defense attorney, is the younger paternal half-brother of Connelly's best-known character, LAPD Detective Hieronymus "Harry" Bosch.

[2] A television series adaptation of The Lincoln Lawyer from David E. Kelley, Ted Humphrey, and A+E Studios, was released on Netflix in September 2022.

Mexican actor Manuel Garcia-Rulfo stars as Mickey Haller, as the series explores the character's maternal Latino heritage.

The elder Michael Haller was one of Los Angeles' premier criminal defense attorneys and his clients included mobster Mickey Cohen and one of the Manson girls.

Although The Crossing (2015) features appearances by Mickey Haller, it is classified as a Harry Bosch novel because it is narrated entirely in the third person.

In 2023, a seventh was published, titled Resurrection Walk, the second crossover novel in the series where some chapters focus on Bosch.

McPherson is a career prosecutor with the Los Angeles County District Attorney's Office, and is nicknamed "McFierce" by defense lawyers.

Haller maintains good relationships with both of his ex-wives and has joint custody of his daughter, who grew up speaking Spanish as well as English.

Following Bosch's retirement, Haller has also engaged the services of his half-brother during times when Cisco was injured or otherwise incapable of working.

With the influx in foreclosure clients at that time, Haller hired an associate, Jennifer "Bullocks" Aronson, a new graduate of Southwestern Law School.

In The Reversal, Haller is appointed as a special prosecutor to overturn the exoneration of Jason Jessup, a convicted child-murderer who was freed after DNA evidence cleared him of wrongdoing.

At the end of The Fifth Witness, Haller files to run for Los Angeles County district attorney, with McPherson's support.