There are two public libraries in Jinan. One is Shandong Library, at the junction of Hualong Road and Erhuan East Road. You can take bus 46, 70, K93, BRT4 and BRT5 and get off at the provincial library. The other is Jinan Library. You can get off at Jingsan Road 150 Jinan Hotel and get off at Zhongshan Park.
Ps: Take your ID card with you when you go.