Washington, Apr 3: US President Barack Obama''s half-sister has inked a book deal.

The first book of Maya Soetoro-Ng, a teacher in Hawaii, is inspired by Maya and Barack's mother as well as by Maya's four-year-old daughter.

In `Ladder to the Moon', Maya pays homage to her mother's tradition of storytelling - and celebrates her mother's enduring legacy of service, reports The Politico.

The tome will be published by Candlewick Press.

Soetoro-Ng, a teacher at an all-girls school in Honolulu, campaigned for her brother and spoke at last year''s Democratic National Convention. (ANI)