Magoun Square-based singer-songwriter Audrey Ryan started a month-long residency at Toad in Cambridge on Tuesday. Each week, in conjunction with a live show, Ryan will give out segments of her book, "The Need to be Heard" which offers insight into the music industry with commentary and interviews from musicians, like Ian MacKaye of Fugazi and Dana Colley of Morphine, and industry insiders, including Pitchfork.com and Asthmatic Kitty records. The gig will be split into three sets. The early show, from 8 to 10 p.m., will be Ryan's friends, such as Dan Blakeslee, Sophie Innerfield, Hilken Mancini and Chris Wilhelm. Starting at 10 p.m., she will perform as the one-man-band of the future. Then, Ryan will play with a backing band or her new outfit The Holey Moley's. Dec. 23 will be a special Christmas show, featuring all the merry tunes perfect for drinking spiked eggnog and belting out.