This is a set of books on programming and IT technology being sold together. Almost all books show signs of use. There are scratches, dirt, and creases, so please only purchase if you do not mind the condition. - Title: Ruby on Rails 5 Quick Start Practical Guide - Title: Readable Code - Title: The Unix Philosophy - Title: Introduction to Git Usage - Title: Software Testing Techniques - Title: React.js & Next.js Ultimate Introduction - Title: Network & Server Construction from Basics ・We want to sell everything together, so individual sales are not possible.