NorthWestWind , vor 7 Tagen

It says

"Linux
Operating System (操作系統)
Core (kernel?) Analysis" (內核分析)

On the side, top down, (also I'm typing trad because I can't write simplified).
"Computer textbook" (計算機教本).
"Beginner" (入門).
"Increase" (提高).
"Master (verb)" (精通)