The Secrets Beneath (Treasures of the Earth #1)

Anna Lakeman has spent her life working alongside her paleontologist father, drawing intricate sketches at every dig. When they find dinosaur bones near their home in Wyoming Territory, they're swiftly caught up in the era known as the Bone Wars. But when her father becomes sick and an old beau, Joshua Ziegler, returns for the summer, Anna's world is upended and the practical, orderly life she has made for herself shatters.