Derek has a cause but, being Derek, he also has a host of misunderstandings to sort out, mistakes to rectify and a wife to mollify. As a natural leader, he knows that beating the Railway Developers is down to him. As a natural disaster area, we know it is unlikely to go quite to plan. In Mac Black's fifth and final Derek book the plot is stirred as poor gullible Derek tries his best and makes us laugh all the way to the end