The post discusses an early access book on system programming in Linux. User comments express concerns over content redundancy with existing resources like "Advanced Programming in the UNIX Environment" (APUE) and "The Linux Programming Interface" (TLPI). Specific chapters mentioned include interactive programming and the NCurses library, which some users feel may be outdated. There is a call for modern features such as io_uring, cgroups, and namespaces to be included for relevance in the current programming landscape. Users are interested in direct comparisons with TLPI and whether the new book offers insights into contemporary Linux capabilities.