<p>There is a myth: that travel and exploration are the privileged pastimes of youth. Adventure has an age restriction, and the extraordinary an expiry date. Vicky Jack's inspiring tale of courage, perseverance and strong-headedness reveals the falsity behind this myth as she becomes the oldest British woman to reach the summit of Mount Everest.<br>The Sky's the Limit is the account of Vicky's journey from the Munros of her native Scotland to the...