In this book, Willow has a fibre optic cable going into her bedroom to provide her with high-speed internet access. It's set in Season 2, i.e. 1997.

In 1997, nobody had fibre-optic cable broadband.
Barely anybody has it now, in 2008!

This technological historical inaccuracy really bugged me. Otherwise it was a decent Buffy tie-in. Battle scene seemed a bit short. Willow kept wanting to do magic and people kept telling her she wasn't ready, which jarred too. Some of the dialogue didn't seem completely in character. Cordelia and Xander stuff was done very well. Story was creative, although it felt a bit squashed into a little volume.