A.M. Bauld's novel Mozart's Sister can be bought through any good bookshop.
Give them the title and the ISBN (0-9550713-0-5), and they can obtain the novel for you quickly.
The book is a large format 9" x 7" paperback of 224 pages with a full colour laminated cover. It is produced by Lightning Source in both the UK and the USA, and only takes about one week to print and bind. All good book trade wholesalers can order copies for supply to your local bookshop.
The book is available online through Amazon - free delivery in about 1 week to ten days. £12.99 in the UK. $24.95 in the US.