Or you could go to your local library and see if they have a copy of the book:-
"Moorgate : Anatomy of a Railway disaster" by Sally Holloway ISBN 0-7153-8913-0
I ordered it through my local library, they had to do an 'inter-library search' to get one. The librarian rang me at home and said that if I wanted my own copy, she had found me one on Amazon for £5, so now I have my own copy.
Be aware of buying it through specialist railway bookshops, who normally have a waiting list for it, as you will pay a high price.