I have the family of William Book and Lena Heithecker in my Book family, but I have four children for them, Charles born 1882 and married Erie Bailey; Crescentia Catherine born 1885; Grace Lena born 1883, married Charles Swain; Helena Agnes Book Miller born 1888 married Albert Gray.'Lena' had been adopted by Mr. and Mrs Isaac Miller when she was 8 months old.I do not have the two that you mentioned because Lena Heithecker Book is supposed to have died in 1888.
William Marshall Book then marriedJersey Ann Rodman, 8 Apr 1890. They had one son, James Sidney. I was in contact with one of James decendants but he must have moved as I lost contact with him.