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Liverpool was European Capital of Culture in 2008.

Anyone interested in the architectural history could do no better than locate a copy of 'Seaport', a justly famous book by the late Quentin Hughes.  Go for the 1993 reprint rather than the first edition as it contains important revisions & additions written by Hughes.   Abebooks.com  is a good place to start...

Any number of books published by the Bluecoat Press (on an almost daily basis, it sometimes seems...) are also worth looking at, though I wouldn't go so far as to recommend a 'sight unseen' purchase other than any by Quentin Hughes &, of course, the most recent Pevsner 'South Lancashire' & 'Liverpool' books.