R. R. Tolkien credits Crockett as an influence on his wolf-fight scenes: "the episode of the 'wargs' (I believe) is in part derived from a scene in S. R. Crockett's The Black Douglas, probably his best romance and anyway one that deeply impressed me in school-days."

The Black Douglas 2017, Pinnacle Press

ISBN-13: 9781374825833

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The Black Douglas 2017, Pinnacle Press

ISBN-13: 9781374825840

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The Black Douglas 2016, Palala Press

ISBN-13: 9781356262687

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The Black Douglas 2016, Palala Press

ISBN-13: 9781358220357

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The Black Douglas 2016, Wentworth Press

ISBN-13: 9781360636504

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The Black Douglas 2016, Wentworth Press

ISBN-13: 9781360810249

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The Black Douglas 2016, Wentworth Press

ISBN-13: 9781360810256

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The Black Douglas 2016, Wentworth Press

ISBN-13: 9781360810379

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The Black Douglas 2016, Hansebooks

ISBN-13: 9783743310322

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The Black Douglas 2015, Palala Press

ISBN-13: 9781342057112

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The Black Douglas 2015, Createspace Independent Publishing Platform

ISBN-13: 9781511701020

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The Black Douglas 2015, Palala Press

ISBN-13: 9781347509814

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The Black Douglas 2015, Createspace

ISBN-13: 9781518666667

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The Black Douglas 2014, Createspace Independent Publishing Platform

ISBN-13: 9781499629422

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The Black Douglas 2011, Nabu Press, Charleston SC

ISBN-13: 9781174648335

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The Black Douglas 2010, Nabu Press, Charleston SC

ISBN-13: 9781145970748

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The Black Douglas 2008, BiblioLife, Charleston SC

ISBN-13: 9781434612083

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The Black Douglas 2008, BiblioLife, Charleston SC

ISBN-13: 9780554264950

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The Black Douglas 2008, BiblioLife, Charleston SC

ISBN-13: 9780554357980

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The Black Douglas 2007, Aegypan

ISBN-13: 9781603122610

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