Sign up for April 22-27, 29. Volunteers are sought for two- or three-hour shifts at Bookstock, a used book and media sale that benefits community literacy projects. Jewish organizations receive credits depending on the number of hours its members work. Designated dates for organizations: April 22, Ann Arbor-based groups; April 23, Hadassah; April 24, Women’s Philanthropy TOV; April 25, National Council of Jewish Women; April 26, JCC Book Fair; April 27, Hillel PTO and Friends of Jane Steinger, and April 29, Farber Hebrew Day School and ORT. At Laurel Park Place, 37700 W. Six Mile, Livonia. RSVP for Bookstock shifts at signupgenius.com or 248-432-5459. Info: bookstockmi.org or 248-645-7840, ext. 365.