Welcome to the world beneath your floorboards. The amazing world of The Borrowers. A sugar cube can last for a week or a pin can be turned into a sword for the tiny Borrowers. All was well until Arrietty, the youngest borrower, makes friends with a human boy. From then on, their worlds get changed forever.
Goodreads
Borrow The Borrowers from the NYPL or find it at your own local library!

Akata Witch
A girl from NYC reveals her magic powers when she returns to Nigeria and has to defeat an ancient evil.