Xiao Shen Ke De Jiu Shu [extra Quality] ✦ Reliable

I believe you are referring to the phrase (小沈克的救书), which appears to be a playful or misspoken variation of the famous novella The Shawshank Redemption — known in Chinese as 《肖申克的救赎》 (Xiào shēn kè de jiù shú).