There's yet another book on the disaster - "Titanic: The Last Night of a Small Town" by John Welshman. Its approach is to chronicle the before, during, and after the ship's maiden voyage through the experiences of ordinary people. They ranged from the few who could somehow afford a first class ticket to the attendants who were honored to be selected to serve on the new ship.
An interesting fact Welshman brings out is that there were pet dogs aboard. Some of those got walked in a special section of the Titanic by the service people.
Those of us who love our animal companions have to grieve not only for those dogs who drowned but also their pet parents who survived. Likely they never forgave themselves for not bringing their four footed companions onto the lifeboats.