Dog Heaven by Cynthia Rylant is a children's book that tells the story of what happens to dogs when they pass away. Dog Heaven title lettering appears to have used a display typeface Lo-Type created by Louis Oppenheim and published by Berthold in 1914.
Oppenheim named the font using his own initials which he also used to sign his work. It is likely that the book title is set in Lo-Type Medium and the author name is set in Lo-Type Medium Italic. You can download and view more information about it here.