Peter Seabrook coordinated the new revisions and Steve and Val Bradley had completed three and were set to revise the rest, updating methods and cultivars, before Hessayon decided to continue work on revising the books himself.
The revised Fruit Expert launched in spring 2015.
Since the Expert guides launched in 1959, the combined sales of all the 21 titles in the range are more than 52 million copies. It is estimated that more than 30 per cent of these sales
have been through garden centre outlets.
The revised New Herb and Vegetable Expert was the last one in the series to be revised personally by Dr Hessayon and was launched by Transworld Publishers in March 2014.