The only book I am aware of is "The Moultons With Irish Heritage" Published by E. Moulton, 1722-7th Ave. N.W., Calgary, Alberta - First Printing, 1988. I do not know if this book is still in print.
The book only briefly touches on the Moulton's of Drummond Centre, Lanark County, Ontario, Canada so I don't know if it would be of any use to you or not.
My email is:
nford@storm.caI have an extensive file on these Moulton's as they are my direct line. Would be happy to share with you.
Norma Ford