Barry Stone, author of 1001 Walks You Must Experience Before You Die, delves into some of the lesser-known aspects of the world's most famous - and not-quite-famous-yet - trails. The perfect accompaniment to practical guidebooks, Stone relates how slings and carabiners kept him from falling headlong off the Sydney Harbour Bridge, and reports on the progress of the continental-wide monster, the Trans Canada Trail, gaps in which are still being filled by countless grass-roots communities. With wal