Blue Heaven by C J Box

12 year old Annie and younger brother William live with their single mother in North Idaho. They are on the run in the woods having witnessed a murder and the murderers know who they are, who their mother is and are after them. The killers, retired cops from Los Angeles, convince the local inexperienced sheriff to let them lead the search for the missing children. True-to-life characters, fast paced plot, a thriller that examines issues close to the heart. A great read. Sandy Penton