Pen is in constant demand to contribute to other people’s books and websites, and to review them, whether the subject matter is polar, environmental, or both.

The following comprises just some of his recent work:

1. 'Who Will Save Us?' by Rebecca Morch - 2007
This is the first book to introduce young children to the science behind, and consequences of, man-induced global warming - told through the adventures of Wise Old penguin and his young charges.  Pen was delighted to have been invited to write the foreword by the author, Rebecca Morch.

2. ‘The Mountain Express’ by John Fisher – 2007
A charming allegorical book for young children which illustrates some of life’s most important lessons – the ones they don’t teach at school – about how to fulfil ambitions.  Pen’s foreword, addressed to the young readers, links his own experiences to the central message in this book.

3. 'The New Green Consumer Guide' by Julia Hailes - 2007
One of the highest-profile and best-selling books of 2007; the original Green Consumer Guide (1988) co-written by Hailes was the classic of its genre.  Hailes’ updated version focuses on how individuals can change their daily lives to reduce their carbon footprint and their impact on the environment more generally. In it, Pen is featured as someone with a story to tell from first-hand experience about the impact that all our combined emissions has on the shrinkage and thinning of the North Pole ice cap.

 4. 'Cold Feat' by Duncan L. Eadie - 2007
Pen wrote the foreword to Duncan Eadie's book based on his experiences as he was catapulted from the concrete safety and security of London into the remote wilderness of the high Arctic on an extreme polar adventure.

 5. 'The Seventy Great Journeys in History' edited by Robin Hanbury-Tenison, Thames & Hudson 2006
As a contributor to this authoritative book, Pen wrote the 'To the North Pole' chapter which summarises the historic race on foot across the Arctic Ocean to be the first to reach the North Pole.  It reviews the attempts by Franklin and Peary, but records that Sir Wally Herbert's 1968-69 British expedition was the first indisputable - and almost certainly only - claimant.

6.  'The World's Wild Places' edited by Colin Prior, Constable, London 2006
As a contributor to this lavishly illustrated book of photographs by Prior promoting our natural world, Pen wrote the chapter introducing Europe.  It gives a personal take on the impact of man-generated greenhouse gases on the North Pole ice cap, and explains the science driving global warming and the consequences of a disappearing ice cap.

7. 'Roald Amundsen' by Tor Bomann-Larsen, Sutton Publishing 2006
Pen wrote the foreword to this significant biography about the most successful polar explorer of all time - Amundsen.  The book focuses on the character, endeavours and continuing influence of this polar giant.  That he reached the South Pole ahead of Scott is widely known, that he was the first to reach, albeit by air, the North Pole is not.  Amundsen's complete list of polar achievements never has been, indeed never can be, surpassed.

8. The Junior 8 Summit (officially linked with The G8 Summit) - visit http://www.j8summit.com/uk/pages/4/346/355
Pen was the key-note speaker at the inaugural J8 Summit in 2005 in Edinburgh.  He has recently contributed a thought-provoking piece on the J8 website entitled 'The Changing Colour of Our Planet' to help stimulate debate amongst participating young people throughout the G8 community of nations on the subject of climate change and carbon emissions.

9. 'Shipwrecked on the Top of the World - Four Against the Arctic' by David Roberts, Time Warner Books 2003
Pen's review was featured in the front of this spell-binding account of how four walrus hunters survived shipwreck in Svalbard in 1743 with no more than the clothes and gear they carried for a day-trip excursion ashore ... for 6 years until the fortuitous arrival of another ship.  One of, if not the, most remarkable Arctic survival stories ever recounted.