I've got the Target novelisations of Nightmare Fair and either The Ultimate Evil or Mission to Magnus. Nightmare Fair was great and featured the return of the Celestial Toymaker (who'd moved onto video games apparently). The other story I don't really remember well. I think it had the return of Sil plus some Time Lord who'd used to bully the Doctor. I have a vague memory of a scene where the Doctor hears his voice and has a bit of a breakdown, crying, which was quite odd.