Someone to Run With (Hebrew: מישהו לרוץ איתו, romanized: Mishehu Larutz Ito) is a 2000 thriller novel by Israeli writer David Grossman.

With his big sister gone and his best friend suddenly the most popular kid in their class, Assaf spends his days at a lowly summer job in Jerusalem City Hall and his evenings alone, watching television and playing games on the Internet.

One morning, Assaf's routine is interrupted by an absurd assignment: to find the owner of a stray yellow Labrador.

Meanwhile on the other side of the city, Tamar, a talented singer with a lonely, tempestuous soul, undertakes an equally unpromising mission: to rescue a young drug addict from the Jerusalem underworld... And, eventually, to find her dog.

Grossman's most popular work to date, a bestseller hailed by the Israeli press and reform politicians like Shimon Peres for its mixture of fairy-tale magic, emotional sensitivity, and gritty realism, Someone to Run With explores the life of Israeli street kids and the anxieties of family life in a society racked by self-doubt.

Leah recognizes Dinka, and trusts Assaf enough to drive him to Tamar's hiding place, a cave in the Jerusalem mountains.

Pesach runs a shelter for street-performing children, and takes their money to support them, while also providing some of them with drugs and alcohol.

Cutting her hair to change her appearance, Tamar sings in the street and catches Pesach's eyes, who takes her in, there she is finally reunited with Shay.

In a joint show, Tamar manages to create a distraction and flee in Leah's car, but abandoning Dinka in the process.

It is revealed that Rhino tipped Pesach anonymously about the cave, then called the police to catch the mafioso in a trap.

Tamar's best friends slowly grow distant from her as she plans her rescue mission, and she discovers they don't understand the depths of darkness in the city, preferring to remain in sarcastic, ignorant bliss.

The book is full with references to real places in Jerusalem: Zion Square, Lifta, Ben Yehuda street and Na'halat Shiva.