Rhiannon Lewis, the infamous Sweetpea killer, finds her attempt at a new life at sea complicated by her past and a lingering desire for violence. Having confessed to her serial killings and fled the UK, Rhiannon is now on a cruise ship, hoping to escape her notoriety. However, the confines of the ship, the presence of other passengers, and the memory of the baby she gave up to pursue her killing spree all conspire to disrupt her plans. She grapples with a potential loss of her murderous urges, questioning if there is more to life than death.

Readers have expressed significant enthusiasm for Dead Head, with many NetGalley reviewers awarding it five stars and praising its dark and thrilling nature. The series, featuring Rhiannon Lewis, is noted for its brilliant blend of comedy and thriller elements, appealing to those who enjoy a darker, more unconventional narrative. The reception highlights a strong reader connection to the protagonist, Rhiannon, with one reviewer explicitly stating their support for 'Team Rhiannon'. The book is recognized for its deliciously dark tone and its ability to keep readers engaged with its unique premise.