Setting up the tables is a big job and Jenny decides where everything goes.
"One of Merv's jobs is to put the category labels out and the boys bring in the boxes. The next day, Wednesday, the big team comes in and they start setting it up," says Jenny.
The first sale in St Hill St took $995.50. A normal sale today will bring in $3000.
Books are stored in the Tawa St building and in a steel container on the grounds. All are kept in banana boxes until day of sale, they fill rooms and are stacked to the ceiling, numbering tens of thousands.
St John has a long-standing tradition, started by the late Tom Armstrong, that every sale must contain a copy of Lord Cobham's Speeches.
"We can not have a book sale unless we've got one copy on the premises," says Jenny.
In 2014 they had book restorer Bill Tito as a guest. He's still talked about.
Money raised is used in St John local facilities upgrading training for youth, supporting the health shuttle service and general maintenance. Proceeds from one sale a year goes to the St John Eye Hospital in East Jerusalem.
The St John Anniversary Book Sale is on October 8, 9 and 10, 10am-7pm on Thursday, 10am-6pm on Friday and 10am-4pm on Saturday at St John Community and Training Centre, 25 Tawa St, Gonville. Cash sales only please, no eftpos.