Cunard, the most famous shipping line in the world, celebrates its 175th anniversary in 2015.Its first transatlantic service, starting with the paddle steamer Britannica, departed Liverpool in 1840. Every year since, in peace and war, Cunard ships have plied the route between Europe and North America.Liverpool was Cunard's world headquarters for 128 years and will forever be regarded as the line's spiritual home. Fittingly, in 2015, the city takes centre stage in the global celebrations to mark the historic anniversary.The remarkable homecoming of the three Cunard Queens - Queen Mary 2, Queen Victoria and Queen Elizabeth, gathered together for the first time on the Mersey - will live long in the memory, as will Queen Mary 2's recreation of the historic 1840 voyage from the Mersey to Halifax, Boston and New York.For the past 25 years, since one million people turned out to see Queen Elizabeth 2 pay her first call at Liverpool, Cunard's modern Queens have been regular visitors to the city, bringing guests and visitors from around the world.Queens of the Mersey charts the company's emotional links with Liverpool and each call to the city by a Cunard liner since 1990.It is a compelling publication for anyone who has ever worked for, sailed or dreamt of travelling with Cunard.