Unfortunately there is a load of innacurate information in that book.
Did have a read of a book called "underground Liverpool" today which was an amazing read and very well researched,it answers some of the myths floating around the internet about some of the Liverpool tunnels.
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell
When the debate is lost, slander becomes the tool of the loser. Socrates