The Last of the Jedi: Dark Warning

The Dark Warning is the second in a series of young reader novels that chronicle the adventures of Obi-Wan Kenobi during his exile following Star Wars Episode III: Revenge of the Sith.

Publisher's Summary
As the second book of the series begins a fugitive Obi-Wan Kenobi, accompanied by a fellow escapee from the Emperor's purge, must avoid bounty hunters including the remorseless up-and-comer, Boba Fett. Their voyages bring them to a war-torn world that refuses to accept Imperial control or that the Clone Wars are over. This planet may have been the last stand of several Jedi warriors. Tantalized by this opportunity to track down clues as to their surviving brethren, Obi-Wan enters this fray, offering his guidance to a rag-tag army determined to repulse the unstoppable Empire.