In my teenage years I helped out at the school library, reading the new arrivals and helping to categorise them for suitable ages. In that time there were a few books which, even now, almost twenty years later, I would still re-read and, furthermore, place on any "Must read" list I was compiling, even for adult readers.
The Bewitching of Alison Allbright is one of those few. Grief, greed, obsession and power all tied together in a neat, compelling package. If you want a book that's light and easy, that doesn't challenge your morals or leave you thinking, avoid this.
Oh, in case you are wondering, the other books I read back then which I think are worth reading (even if you are an adult) are the following...
The Changeover by Margaret Mahy (This won numerous awards and accolades and is well worth a look)
This Time of Darkness by H.M. Hoover (Dystopian future world, better than many seen in modern movies. Think "1984".)
Children of the Dust by Louise Lawrence (Three connected stories based on the aftermath of a nuclear war. A hard read, I know adult readers who couldn't even finish this book.)