<p>Cyclocross is no longer cycling''s hidden gem. Its rapid growth in the US--and its new popularity as off-season training--means this intense and dramatic sport is exploding into the mainstream. With a season running from September to February, cyclocross is cycling''s only purely winter discipline, demanding a combination of athleticism, supreme technical skill, and ruthless tactics for the muddy conditions.</p><p>In the sport''s heartland of Belgium, major races attract crowds of thousands and have a carnival atmosphere fueled by heavy drinking, ringing cowbells, and pumping airhorns. Many top riders have enthusiastic fan¿clubs and are national celebrities--one even had his own reality TV show. On race day, Belgian and Dutch television coverage is akin to a major football game in the US, stretching for hours with pre-¿race interviews, pundits, and behind-the-scenes films.</p><p>In <i>Rainbows in the Mud</i>, Paul Maunder spends a season soaking up the sport''s rich culture and hist