H.M.S. Unseen (novel)

H.M.S. Unseen
First edition (UK)
AuthorPatrick Robinson
LanguageEnglish
GenreWar novel, Thriller
PublisherCentury
Publication date
4 March 1999
Publication placeUnited Kingdom
Pages544
ISBN9780061098017
Followed byU.S.S. Seawolf 

H.M.S. Unseen is a naval thriller by Patrick Robinson published in 1999. It is the third book in the series featuring Admiral Arnold Morgan and marks the return of Ben Adnam. Stylistically, it is similar to the works of Tom Clancy, particularly his The Hunt for Red October. Unlike the previous two books in the series, this novel focuses less on the plot and heroes, and more on the character development of the villain, Ben Adnam.