When they are separated for the first time since birth, Iris and Lark struggle with insecurities over their individual identities at the same time things begin to go missing around town.

When Lizzie and Gael share an irresistible challenge, to find the peacock ring that once belonged to artist Frida Kahlo, Paloma decides it is the perfect way to honor her father.

A little boy offers advice to his cat, which is lost in the city, from taking shortcuts through safe alleys to finding a friend in the park.

Sloane and Amelia clash with rival detectives when they travel to Tangle Glen mansion with the goal to find the two million dollars that went missing on the premises decades ago.

When Emma's little brother Jake looks after the neighbor's dog in preparation for getting his own puppy, the pet goes missing and Emma and the rest of the girls have to find it before the owner comes home.

A child and dog search for a lost pet, Mister Kitty, as the child describes what Mister Kitty looks like to the reader.

"Wnen Mercy Watson the pig goes missing, all of Deckawoo Drive is in an uproar...Will the clever neighborhood sleuths manage to follow the trail of hoofprints and a certain overwhelmingly enticing scent and recover their porcine wonder?"-

WINNER OF THE STONEWALL BOOK AWARD! Thor's hammer is missing again. The thunder god has a disturbing habit of misplacing his weapon--the mightiest force in the Nine Worlds. But this time the hammer isn't just lost. It has fallen into enemy hands. If Magnus Chase and his friends can't retrieve the hammer quickly, the mortal worlds will be defenseless against an onslaught of giants. Ragnarok will begin. The Nine Worlds will burn. Unfortunately, the...

Paige Darling loves the stuffed rabbit her grandmother has made for her, but when she ties a helium-filled balloon to Bun Bun Button the toy gets loose and goes floating away, and it may take some Darling luck to bring her home.

Mini finds a dog in the park wearing shoes but no collar and begs to keep him, but soon she realizes that whoever put the shoes on him loves the dog, as well.