Unlike the modular NCS textbooks on the market, this book is an integrated textbook that reinforces the concepts, problems, and explanations of the PSAT type, which is the type of test actually used by many companies.
It was created to provide practical help to beginners and experienced learners who lack information about NCS in preparing for employment at public corporations, such as by providing the solution order of successful candidates and time-saving tips.
This book consists of two volumes: a concept + question section and an explanation section for the PSAT and modular types. Its main features are as follows:

first.
The most detailed explanation
For the difficult PSAT, we have written detailed explanations for each question, each longer than one A4 page, along with easy-to-understand illustrations.
Additionally, it includes 2-3 explanations for each question, suggesting a variety of approaches.
Therefore, self-study is possible as if you were receiving private tutoring.

Second.
Concept + Problem Solving, 2-week short-term study plan provided for daily study
We provide a short-term completion plan for the PSAT and modular formats to ensure a balanced mix of concept + basic/difficulty problem-solving practice.

Third.
Passing on practical know-how from successful candidates
Eleven experts, including those who passed major public corporations, students from prestigious SKY universities, and those who passed the civil service exam, will intensively analyze public corporation NCS questions to provide the most effective learning experience, including the solution order of successful candidates and time-saving tips.

Although I am self-studying, I can feel the effect of receiving private tutoring from someone who passed the exam.