book valuation please

[hawkdriver]

Hi, i was recently given from a friends estate The book, webley rifles 1925-2005 by christopher thrale, its author signed on the inner page and dated oct 2010, so probably 1st printing, its not of interest to me, but would like to sell and give his widow the money, it has fly cover and looks pretty much unread.any idea if it has any special value would be appreciated prior to advertising, thanks