Robbins' open source book may be of interest as well: GAWK: Effective AWK Programming https://www.gnu.org/software/gawk/manual/gawk.pdf https://www.gnu.org/so

Robbins' open source book may be of interest as well: GAWK: Effective AWK Programming https://www.gnu.org/software/gawk/manual/gawk.pdf https://www.gnu.org/software/gawk/manual/gawk.pdf