Lulu and the brontosaurus - Viorst, Judith 1931- (Atheneum Books for Young Readers, 2012)
Lulu's parents refuse to give in when she demands a brontosaurus for her birthday and so she sets out to find her own, but while the brontosaurus she finally meets approves of pets, he does not intend to be Lulu's. -- Ages 6-10.