Title from disc label.
Disc 1: RG9/ 762 - 777.
Disc 2: RG9/ 778 - 790.
Disc 3: RG9/ 791 - 802.
Disc 1. Registration districts: Staines, Uxbridge & Brentford
disc 2. Registration districts: Brentford, Hendon & Barnet
disc 3. Registration districts: Edmonton + master index.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Middlesex 1861 census. ISBN 1861507496. Published by S & N British Data Archive in 2004. Publication and catalogue information, links to buy online and reader comments.
