Capítulo 664: Chapter 33: Information Prepared for Earth! [Subscribe request] _3

"Ten thousand Auster Yuan? ..." Jia Yan was taken aback when the bill came.

"Yes, Lord. In the books you purchased, many of them are explicitly forbidden from massive distribution in the interstellar civilization. Like this one... On the Further Use of Nuclear Energy. And this one, on how the basic starry sky industry developed. And this one…"

The library staff hurriedly began explaining to Jia Yan book by book. The expensive books were indeed these few. After all, some of the books truly were forbidden. They dared to sell them here, but they didn't dare to blatantly sell them at extremely low prices. Mass distribution of these books, especially in the hands of many small elementary civilizations, is absolutely not something the advanced civilizations would allow!