Tenacity

"Suicide must be investigated--especially when a Royal Navy sailor kills himself on a nuclear submarine, only days after his wife's brutal murder. Now Lieutenant Danielle Lewis, the Navy's finest Special Branch investigator, must interrogate the tight-knit, male crew of HMS Tenacity to determine if there's a link. Isolated, and standing alone in the face of extreme hostility, Dan soon realises that she may have to choose between the truth and her own survival"--Amazon.com.sa.