The Race Begins oleh M. L. Buchman

When the person you depend on most disappears, where do you begin the search?

 Dilya Stevens, nanny and dog sitter to the First Family, always trusts herself, her dog, and her mentor—first, second, and third. Everyone else stands outside that circle.

 But when her retired-spymaster mentor disappears, Dilya and the First Dog can’t find her alone. To save the future, she must reconnect with her past.