Hidden London - Highgate

I haven't got that book, but I plan to get it sometime. Is it worth reading? I saw a picture of the station online. The surface building is now a bank, but there's still some stuff left underground. I read somewhere that either the British Museum or Holborn stations are meant to be haunted by an Egyptian ghost and there were rumours of a secret tunnel going from Holborn to the Egyptian room of the museum, but I doubt that's true. The history of Holborn station is one of the reasons it's my favourite station. It's certainly not a dull one. Only thing that ruins it is the overcrowding and it would probably annoy me if I had to use it every day.