John and Peter Book

I'm looking for any information on John Book and his family. John Book b.1843-d.1926. His wife was Rilla Brown b.1843-d.1926 They are buried in the Tomlinson Cemetery in Rockford, Ohio. John's father was Peter Book.
John and Rilla's children were: Henry Milo Johnson b.1869 (Rilla's child from a previous marriage),Ketura Jane Book b.1871, John Asa Logan Book b.1885,Luella Raven? Book,Albert Odin Book b,1887,James Francis Book b.1881,and Bertha Book. I was told that the Books came from PA. Any help would be very much appreciated!
Thanks,
Lisa Kirkland