The book was, and continues to be, widely influential with its direct and often witty language, urban references such as plastic daffodils and bus conductors, and frank, but sensitive (and sometimes romantic) depictions of intimacy.
Another book in the same format, and with complementary graphics, was also published in 1983, titled New Volume and with all new poems by each poet, and the same biographies as in the revised edition.
He uses it three times in the poem, the first two to introduce a list of contradictions, such as "Supermarkets will add 3d EXTRA on everything" and "The first daffodils of autumn will appear/when the leaves fall upwards to the trees".
The poet explains the world is going to end at lunchtime in order to persuade a passenger on the bus to make love with him.
Henri includes "Poem for Roger McGough", which describes a nun similarly thinking what it would be like to "buy groceries for two" in a supermarket.
The three poets were active in "swinging" Liverpool at a time when it was a centre of world attention, due to the eruption of The Beatles and the associated bands, known generically as the "Mersey Sound", after which the book is titled.
"[2] The book had a magical effect on many people who read it, opening their eyes from "dull" poetry to a world of accessible language and the evocative use of everyday symbolism.
"[3] The same experience is described by a freelance writer Sid Smith years later in a 2005 blog, looking back at his first encounter with the book in 1968, when again a teacher read from it: The cover design was a psychedelic beacon flashing at the outer edge of our black and white lives.
The times were polarised and solarised and this small book was impossibly exotic and esoteric ... During 1969 that slim volume was as well read as any of my Marvel and DC comics, space race encyclopedia or the Dr. Who annuals that never quite lived up to the show itself.
It made me feel somehow connected to, well, whatever it was that I thought was going on out there in that wider, long-haired world that I intuitively knew I wanted to be part of.
[4]The three poets in The Mersey Sound paved the way for later performance and "people's" poets, such as John Cooper Clarke, Benjamin Zephaniah, Linton Kwesi Johnson, Attila the Stockbroker, John Hegley and others who "have pursued the goal of creating poetry for a wide audience".
[4]As the early readers of the book got families of their own, they could find the simple language and rhyme of some of the poems suitable for bedtime reading for their children.