Graham, a dealer, collects and sells rare books. Whilst visiting a local town he notices

that Peter has three rare editions for sale in his second-hand bookshop. He negotiates

and agrees a price of 500 for each of the rare editions.

On the assumption that he will have the books in his possession, he negotiates to sell

the first book to Eric for 800. The second book is to be sold to Helen for 600, together

with another rare book that Helen is to sell to Graham for 400 (as Graham has a buyer

for this book in the sum of 600). The third book, which is the only surviving copy, is to

be sold to Richard for the sum of 1000.

Graham has now returned to collect and pay for the three books from Peter as agreed.

He is shocked when Peter informs him that the sale is off because he has received an

offer from Bertram in the sum of 2000 for the set of three books and has agreed to sell

them to him.

Explain what remedies, if any, Graham has against Peter.