Attack of the Unsinkable Rubber Ducks
kiltsandlollies posted a link to this book (narrated by Billy!) on audible.com, but I didn't like the amount of information they wanted from me (why do they need a street address for a download?), so I went searching elsewhere and found that you can buy the CD set from Amazon UK for GBP 11.82 (less VAT if not in UK, plus P&P). My copy's already on its way ...