There's a series of books...dating back to the 90's. Plotlines for the two shows don't necessarily follow one single novel...they mix and match that along with adapt characters. Mickey Haller from Lincoln Lawyer was introduced as Harry's half-brother in the books, but different studios have the rights to each, so they created Honey Chandler for the show.. The earliest books were the best, but I never regretted a single read. The reporter on the show has two or three books dedicated to his character as well.