In 1995 Leo Cooper published Peter Oldham's book "Pill Boxes on the Western Front". Soon this book was sold out.
The well written book contains a lot of interesting informations about British and German Great War Pill Boxes. There are many photographs, drawings, scetches and several maps.
This year Pen & Sword Military reprinted this volume in a slightly smaller format. The printing quality is - in my opinion - not as good as the 1995 edition's but I think this title is a very useful addition for historians, modellers etc.