I bought this book with high expectations because I loved the first book and I wasn't disappointed. The book is set 11 years after the first book and Barry now has a wife , Ermine Cringer (Who would of thought it?, and 2 children Nigel, 11 and Fiona, 3.
Whilst Fi has the magic tough Nigel is practically a Muddle but Barry being the big-head he is bungs Nigel on the Hogwash Depress and off the Hogwash School of Wizardry and Witchcrap and the chaos begins. Dorco is now the Headmister but dies (yet again) after a tragic accident and Barry and Ermine are appointed as Headmister and Headmistress much to the dismay of Snipe and Mumblemumble (the new Dork arts and craft professor).
I won't tell you anymore (buy the book) but they are LOTR references and much more of Immortal the mouse, Timothy. The writing is witty and pokes fun at whatever was left from the first book (except for OotP because it was wrote before its release)
Altogether a good book and an enjoyable read.