The memoir, “Relentless: My Story of the Latino Spirit That is Transforming America”, chronicles the remarkable trajectory of Luis A. Miranda Jr., a Democratic political strategist and influential Latino political adviser and philanthropist.

Miranda describes his journey from his childhood in Puerto Rico to becoming a prominent political figure in the United States. He recounts his socialist activism on his home island and his move to New York in search of opportunities. The book highlights his role as founding president of the Hispanic Federation, one of the leading Latino advocacy groups in the U.S., and his involvement in successful political campaigns, including those of Hillary Clinton, Chuck Schumer, and Kirsten Gillibrand.

According to a report by NBC News, in addition to his political achievements, Miranda shares personal experiences, including the challenges faced by his family after the birth of his son Lin-Manuel, creator of the musical "Hamilton". It also addresses the devastating impact of Hurricane Maria on Puerto Rico in 2017 and his efforts to raise funds and aid for the island's recovery.

“In ‘Relentless’, which [was] out on May 7, Miranda describes his political evolution, from a young, idealistic socialist enmeshed in the politics of his island home to becoming an activist in New York and later a national political and philanthropic presence. His shift was in part driven by economic reality; when his son Lin-Manuel was born in 1980, the family was living without medical coverage”, according to NBC.

The book highlights Miranda's dedication to the Latino community and his belief in the importance of inclusion and diversity. He emphasizes the need for politicians to recognize Latino voters as persuadable individuals, rather than assuming their automatic support.

The foreword, written by Lin-Manuel Miranda, reveals the son's deep respect and admiration for his father, highlighting Luis Miranda's support of Lin-Manuel's career and his personal sacrifice to help finance the production of "Hamilton."

Through heartwarming stories and inspiring reflections, "Relentless" offers a unique insight into the life and career of Luis A. Miranda Jr., a figure whose impact transcended the boundaries of politics to influence Latino culture and community across the United States.