Rabbi Arthur Gross-Schaefer, a Santa Barbara clergyman and author, will do a book signing for “The Rabbi Wore a Collar,” 6 p.m. Monday, Oct. 16 at Chaucer’s Books, 3321 State St.

In the third book of Gross-Schaefer’s “Rabbi Elija Daniels” mystery series, a group of Jesuit priests invite Rabbi Daniels to join them on an investigative visit to Nicaragua shortly after the Sandinista revolution toppled the Somoza dictatorship.

Daniels is interested in going so he can determine if this new revolutionary government is anti-Semitic, as is being charged by the U.S. government. He is warned by the State Department that if he goes to Nicaragua as a rabbi, he will be killed.

The Jesuits promise to protect Daniels with their lives by hiding his identity as he travels with them. However, he is soon embroiled in the murder of a nun when one of the Jesuits he befriends is accused of the killing.

Daniels announces he will act as the priest’s attorney and reveals that he is a rabbi. However, he is now warned that his involvement as a defense attorney could place him in jeopardy of being imprisoned along with the accused priest.

His only protection is the appearance of a mysterious woman he inexplicably meets during his midnight reconnaissance of the Jewish cemetery. While Daniels is able to get the accused priest out of Nicaragua, the same priest seeks out the rabbi several years later when he once again is accused of murdering a nun.

Rabbi Gross-Schaefer is the spiritual leader for The Community Shul of Montecito and Santa Barbara.

He is a professor of business law, ethics, mysticism and sustainability at Loyola Marymount University. He has been listed by the Princeton Review as one of the top 300 university professors nationally.

He consults with nonprofit and profit-based organizations on effective ethical decision-making, sexual harassment, and time management. He publishes and speaks on such topics as academic freedom, professional ethics and burnout, spiritually in the workplace, and immigrant rights.