BLACKWELL'S bookshop has sold its most expensive book for £75,000.

The 1513 complete works of Plato was sold earlier today to an un-named overseas institution from the shop’s rare books catalogue.

The two-volume work, published in Venice, was the first ever edition of the philosopher’s works in their original ancient Greek.

Blackwell’s antiquarian book seller Andrew Hunter said the book was at one time owned by an American collector, and was sold at an auction in New York on his death.

The Oxford bookshop in Broad Street, founded in 1879, had since bought it from the buyer.