Comparing a range of recently published books on volcanoes proved to be an interesting experience. Would the figures quoted be consistent? Would the same library photographs be used? Would the same events be seen as significant? Would they be readable and useful? Answers: No, Yes often, Not always, and Yes generally.

My favourite of the selection has to be Earthquakes to Volcanoes - here explanations are given rather than implied and the 'things to do' sections explain further. The book is extravagantly over ambitious, not just earthquakes and volcanoes but the effects of wind, rain and frost too - and all in 32 pages. For clarity and as an introduction though, it's ideal.

At the other extreme is the Eyewitness guide, Volcano - full of a mass of information and illustrations, not just the expected artefacts (Pompeiian bread) but also dramatic photographs and models. This book also gives more information about the infrequently mentioned St. Pierre volcanic disaster of 1902 in which nearly 30,000 died. It is a volume that will prove popular both for curricular support and general interest browsing.

A more straightforward but still useful volume is Mountains and Volcanoes. This works well in relating the earth-shattering to the mundane (a volcanic eruption can be compared to a fizzy drink.) It also includes a number of good experiments which would be useful for teachers too.

Also likely to appeal to chldren is Volcano in the appropriately named 'Violent Earth' series. Here the emphasis of both text and excellent colour photography is on the drama and devastation, but the inclusion of informative cutaways provides another dimension. This book is also strongest on the creative power of volcanoes - the section on Surtsey is exciting but informative too.

There is no shortage of items for primary or secondary children on volcanoes. As well as the books included here BfK has recommended two other titles on the subject in the last year.