First published in 1982, this book reads a bit like a cross between Enid Blyton's secret seven and the My parents are aliens TV series, except that here the very odd characters are at school rather than at home. Dinah has just moved to a new foster home where the incumbent boys (particularly older brother Lloyd) are very suspicious of her. Perhaps with good reason, as from the very first day at her new school, Dinah can see that something is horribly wrong. All the schoolchildren are just too perfectly behaved, and her free-thinking step-brothers are being excluded and treated as trouble-makers. And before long, the Headmaster asks to see Dinah....
My son (10) is really enjoying me reading this book to him at bedtime (at 160 pages it is taking a while). We started off with the Puffin edition and then bought this edition when the library recalled it. We were disappointed that, unlike the Puffin version, this book has no illustrations (and the front cover is a bit bland compared to the traditional cover image of the Demon Headmasters face - but then in a way the old cover gave away a lot of the plot). But the story reads well enough without line drawings, and we have now bought all the other five books in this series : The Demon Headmaster and the Prime Minister's Brain, The revenge of the Demon Headmaster, The Demon Headmaster takes over, The Demon Headmaster strikes again, and Facing the Demon Headmaster. They must be read in order to make sense of what is going on.
Some of the language in Demon Headmaster seems dated, mainly Lloyd's food related exclamations, which make it read very much like a 1950s Enid Blyton book (no bad thing - and my sons often laughs out loud at his expressions). But it's a well crafted story that kept my son's attention throughout, and, although tense in places, it's surprisingly non-scary considering the plot-line. Unlike his favourite AstroSaurs and Captain Underpants books, this book is probably more girl friendly as well. Just a shame the excellent TV series isn't available on DVD at the moment to compliment this very good book (aimed at 7-12s I would say). It just loses a star as we missed the illustrations of the Puffin version.