Dianna Costello


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A Boston native, Dianna worked in the L.A.'s film business as a freelance producer and production manager on TV and film projects. While living there, she earned her MFA in Film from the American Film Institute and taught film production at UCLA Extension’s Entertainment Studies Division. Her short fiction film "Graffiti," that she initiated and produced at AFI, earned an Academy Award nomination and won several national and international film festival awards. In addition, she wrote story treatments and developed film projects, landing a development/ production deal at Paramount Pictures for the feature film “Borrowed Time.” Along with her MFA from AFI, she holds a B.A. in English from UMass-Boston and a M.S. in Television/Radio from Syracuse University.
Her publishing credits include articles for several film industry magazines (Documentary, Real Screen, Production Update), featuring interviews with high profile filmmakers and film industry executives. After leaving L.A., she held several positions in the film industry, including Executive Director of a NC regional film commission and Executive Director of the NH Monadnock International Film Festival. Prior to landing on Cape Cod as a "wash-ashore," she served on the Board of Directors for Winston-Salem Writers as their VP/Programs Chair. Now she spends her free time hiking nature trails, taking sunset photos, and expanding her seashell collection while looking for the next story that will ignite her imagination and inspire her next novel.
Her dual timeline, historical novel, "Sea Across Time," will be published by Historium Press in 2027. Inspired by the true account of Nantucket’s worst shipwreck in 1886, a Nantucket antiques shopkeeper grieving the mysterious disappearance of her husband at sea, is haunted by her connection to one of the island’s most famous sea tragedies. “Sea Across Time” is a mystery without a crime, and a love story that transcends time, with a supernatural thread that interweaves the lives of two women more than a century apart and intertwines their fates with a spectacular twist at the end.

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The Sea Across Time
Alternating a present-day mystery with a historical sea tragedy, "Sea Across Time" interweaves the lives of two women more than a century apart. Shelley, the contemporary protagonist in 1995, is a Nantucket antique store owner whose life falls apart after her husband Ray mysteriously disappears while sailing close to shore. After several other accidents occur at the same place, she suspects a connection with the historic painting her husband won at an auction before his accident. Alarmed by supernatural encounters that threaten her sanity, Shelley embarks on an obsessive quest to unravel what’s behind these disturbing incidents. In her research of the T.B. Witherspoon shipwreck, she uncovers the past story of Sarah and her six-year-old son that ended in tragedy. Their first voyage on her husband’s merchant ship in 1885 ran aground close to Nantucket’s shore during a fierce Nor’easter, depicted in the painting she now owns. As the past and present converge, Shelley must grapple with her connection to this event in order to heal her anguish and put to rest the ghosts that haunt her. At its heart, “Sea Across Time” is a love story that transcends time and an exploration of grief as a legacy from the past.
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