There are various copies among the descendants of (at least) their sister Mary Moore. I got my copy from my Mom. Two of my aunts also have copies (Mona Diefenbach and Maye Boyd.)
The full title is: A Wagon Load of Cookwood: Some Memories of the W.G. Moore Family
Mabel's section is short, just 5 pages, though as the oldest of the 3, she is referenced often in the other 2 sections, especially Pleas's. It is a letter Mabel wrote to Pleas that she wrote for the book. Heber's section covers pp. 6-78, and Pleas finishes it out with pp. 79-156. The first pages of Pleas's section is titles "Our Ancestors" and is a 4 page chapter where he gives a listing of his ancestors, including transcriptions of some letters from Pleas Vinson (his uncle) and Charlotte Ann (Vaugn) Stoll.
William Gardner Moore (abt.1876-1957) is the W.G. Moore referenced.
The 1930 Census lists the Moore and Lowery families on lines 26-38. (Earnie's and Leslie's names are misspelled. Mary Ann and Paul Norman married shortly after the census I believe.)
|William G. Moore||53||Head||Male||Illinois||Farmer|
|Nellie B. Moore||49||Wife||Female||Illinois||None|
|Erney C. Moore||21||Son||Male||Illinois||Laborer|
|William P. Moore||19||Son||Male||Illinois||None|
|Mary A. Moore||16||Daughter||Female||Illinois||None|
|Ruby P. Moore||14||Daughter||Female||Illinois||None|
|Mildred L. Moore||11||Daughter||Female||Illinois||None|
|Lesley D. Moore||9||Son||Male||Illinois||None|
|Louis G. Lowery||56||Head||Male||Illinois||Farmer|
|Paul N. Lowery||22||Son||Male||Illinois||Laborer|