STEP has published three books written by John Martyn.
Order $25 Field Guide to the Bushland of the Lane Cove Valley
Order $25 Sydney's Natural World
Order $20 Understanding the Weather
We also sell Field Guide to Royal National Park (published by the Linnean Society) for $15
Note 2: You don't need a PayPal account to pay using PayPal
Note 3: STEP members get a discount of 30% (to activate this, at Step 5: Payment Method, enter STEPMEMBER into the Coupon Code)