The general volcanic information Anita Ganeri provides in Violent Volcanoes (and I have been reading the 2015 edition on Open Library and not the 1999 first edition as was the case with her Stormy Weather), this seems to be (at least from what I personally know and have been taught regarding volcanoes both at school and equally so when I took a first year geography course at university) decently factually correct and nicely suitable for readers from about the ages of eight or nine onwards (albeit the lack of sources and no suggestions for further reading except for a few choice websites is definitely something I do find annoying and academically problematic, and that in my opinion, Ganeri should also be featuring so-called super volcanoes in Violent Volcanoes and also focus a bit more on vulcanism in the the distant, in the prehistoric past, such as for example present how the Permian-Triassic mass extinction event of two-hundred and fifty million years ago was likely caused by millions of years of continuous volcanism).
And just to say that with regard to my personal reading enjoyment of Violent Volcanoes, well, aside from my issues with Anita Ganeri not including bibliographical information and I also needing something about super volcanoes and prehistoric volcanism (see above), I also have two more bones of textual contention which cause me to rate Violent Volcanoes with only a three star rating, a rather high three stars to be sure, but not yet sufficient for me to consider four stars. For one, I have found the humour Ganeri uses in Violent Volcanoes crass, artificial, often leaving me feeling majorly uncomfortable when this is juxtaposed with stories of volcano related devastation and horror (not to mention that the constant denigrations of geography teachers and of teachers in general truly does makes me rather cringe). And for two, while Mike Phillips' black and white cartoons for Violent Volcanoes are aesthetically adept, personally speaking, I have found them much too silly for my tastes and also too visually unorganised and occasionally even quite confusing (and that I also would definitely prefer colour illustrations and also some photographs be included in Violent Volcanoes). So therefore, while Violent Volcanoes is definitely nicely educational, I am indeed with regard to text and images a bit bah humbug and that especially what Anita Ganeri thinks is humorous and is meant to lighten Violent Volcanoes for the most part just does not really work all that well for me (and actually not at all).