○ Purchased used in the past. ○ No markings or writing. ○ Slight yellowing, but the contents are in good condition. Please refer to the photos. ○ Stored in a non-smoking, pet-free home. ○ Considered a rare book, it comprehensively introduces regular expressions that can be used on Linux and Mac, making it a convenient book to have. Priced lower than the market price on Mercari. Please purchase only if you understand that this is a used item. "Grep, sed, awk: Manual & reference" Akihiro Miyoshi Price: ¥2500 #AkihiroMiyoshi #book #computer/computer