Shackles from the Deep is a historical book written by Michael Cottman. The book tells the story of the British slave ship, Henrietta Marie, which sank in the Florida straits in 1700. The author takes the reader on a journey of discovery, as he dives deep into the history of the Henrietta Marie and the legacy of slavery in America.

Cottman's research is thorough and meticulous, and his writing is both engaging and informative. He uses a combination of historical accounts, personal stories, and his own experiences as a diver to paint a vivid picture of the horrors of slavery and the lives of the people who were enslaved on board the Henrietta Marie.

Overall, Shackles from the Deep is a powerful and thought-provoking book that sheds light on an important chapter in American history. It is a must-read for anyone interested in the legacy of slavery, the African American experience, and the history of the Atlantic slave trade. Cottman's passion for his subject matter is evident on every page, and his writing is both informative and emotionally resonant.