No, the service is now run by Nielsen. http://www.isbn.nielsenbookdata.co.uk/
J.H Whittakers
The ISBN of Cut Numbers is 0517568705.
ISBN numbers are not related to maths. They are a system of identification for books.
The ISBN of And Still I Rise is 9780394502526.
The ISBN of The Still Point is 1846272297.
The ISBN of And the Land Lay Still is 9780241143568.
The ISBN of We Still Hold These Truths is 978-1935191674.
Yes, an International Standard Book Number (ISBN) can contain both letters and numbers. The standard format for an ISBN is 13 digits, including both letters and numbers.
The ISBN of Still Life with Crows is 0-446-53142-1.
The ISBN of Beside Still Waters is 0-688-16065-4.
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Whittakers, Cadburys...