In 1964 Bula Trueblood Watson published the book The Trueblood Family in America: 1682-1963, John Trueblood of Shoreditch England, and His Descendants. As far as I can tell Bula was the sole author who had relied on contributions of others. The second printing was published in 1970.
Years later, her grandaughter has made an attempt to update the material in the book on-line by collection information from individuals at the above address.
This book almost has to be inherited as it is rare.
Beware of individual(s) who are claiming to have written the book with Bula (their name(s) name does not appear in the original book)and trying to sell a so called updated although incomplete version at a handsome price.