This collection of stories from some of horror fiction&rsquo;s best authors will glue you to the page, but watch out; it may leave you too afraid to take the metro to work.<P>In deep tunnels something stirs, borne on a warm breath of wind, reeking of diesel and blood. The spaces between stations hold secrets too terrible for the upper world to comprehend and the steel lines sing with the songs of the dead.<P>Jonathan Oliver has collected together some of the very best in new horror writing in an themed anthology of stories set on, and around, the New York subway, the London underground, the Metro and other&nbsp; places deep below.