He is survived by his wife, Vita, and daughter, Deborah. More information can be found here, including a list of his published works.
Several of his books are available online for free under the following categories:
The Emergence of Hyper-Calvinism in English Nonconformity, 1689-1765.
I would like to express public gratitude for his early labors on John Owen. Toon's biography, God’s Statesman: The Life and Work of John Owen--Pastor, Educator, Theologian
(1973), remains the best biography available. Dr. Toon also uncovered the scant correspondence of Owen's that remains (no longer online, unfortunately), as well as Owen's Oxford Orations.
So I give thanks to God for the faithful labors of Dr. Toon.
HT: James Grant