Mr Majeika - Everyone's favourite wizard

I found this Mr Majeika book the other day

and I was surprised by the tagline "Everyone's favourite wizard". This edition was published in 2004. By then, five of the Harry Potter books had been published and two of the films had been released. Lord of the Rings had been published for 50 years, and the latest trilogy of films had been released. I'm sure that Mr Majeika has his fans, but to claim that he's everyone's favourite seems a little ambitious to me.