Context:

Explicitly mentioned as 'his book, Titanic Lives' when discussing statistics about survival rates on the Titanic and analysis of why certain passengers lived or died. The book is described as being written 'very much as a dark comedy' and is referenced multiple times throughout the episode for various details about the disaster and its aftermath.

Context:

Referenced multiple times throughout the episode as a key source for the Titanic story, including examples of survivors' accounts, stories of specific passengers like Emma Bucknell and Rhoda Abbott, and analysis of the tragedy.

Context:

Explicitly mentioned as a book with 'a brilliant section' on Lebanese and Armenian emigrants on the Titanic. Also mentioned later as the book Sadie was reading when they visited Belfast.

Context:

Referenced multiple times throughout the episode as a source for information about the Titanic passengers. Explicitly named when discussing why Taft liked Archie Butt and later when describing passengers Lutie Temple and Imanita Shelley.

Context:

Explicitly mentioned as 'an absolutely brilliant book' containing statistics about Atlantic crossings and mortality rates on sailing ships versus steamships, as well as quotations about Belfast and Edwardian visitors.

Context:

Mentioned as a 'recent biography' or 'very short biographical sketch' of Gordon, in which the author describes Gordon as 'a creep' in relation to his work with boys.