The Book of Dust: La Belle Sauvage (Book of Dust, Volume 1) by Philip Pullman
SF TEEN PULLMAN
When Malcolm finds a secret message inquiring about a dangerous substance called Dust, he finds himself embroiled in a tale of intrigue featuring enforcement agents from the Magisterium, a woman with an evil monkey daemon, and a baby named Lyra.
The Whole Thing Together by Ann Brashares
On alternating weeks, Sasha and Ray vacation in the beach house their parents refused to give up after their divorce, but they never meet until one summer when their lives and those of their siblings intersect in ways none of them could have imagined.