"This book is an essential resource for anyone engaged with digital preservation activities. It becomes increasingly difficult to focus purely on the preservation of simple digital objects, we have to engage with the complex because developing ICT capabilities provide us with the means to incorporate more and more complexity in the artefacts and genres we create and use. Keeping up to date with advances in digital preservation know-how is challenge enough in itself; bringing together these outputs from the POCOS meetings in a single print resource provides much needed practical assistance. "