The reason for not recording is simple.
First, books are precious and scarce: at that time, literacy was the privilege of the upper class, and few people would learn it. At that time, there was no paper, and books were mainly recorded on bamboo slips and silk books, which were bulky and expensive. If you make a book, adding a copy may not be as big as a slap in the face. Maybe even the original.
Secondly, it is not easy to preserve. Bamboo slips and silk books are easy to be carbonized by insects, and it will be difficult to keep them intact for a long time.
Third, it is not easy to spread. Because the number is very small, and after 800 years in the Spring and Autumn Period and the Warring States Period, it is easy to be lost. While burning books to bury Confucianism, Qin confiscated all the books in the world, except the medical officials and the people, and all the others were returned to the palace. When Xiang Yu destroyed Qin, Xianyang and Epang Palace were burned, causing a large number of books to be annihilated in the war.
Fourth, Lao Tzu had a collection of books in Zhou at that time, and there was no specific name. For example, Laozi is a compilation of Laozi's words, and the Analects of Confucius is what Confucius said. Disciples recall it as The Analects. I'm afraid the history books recorded by Zhou historians were also called history books at that time. Just like now, if you keep a diary and only consider saving it for your son to read later, you don't have to take any fancy names. Just a diary.
Specific.
D: Huangdi Neijing was written in the Warring States Period. But its theory and some chapters should have a long history. Lao Tzu also wants to see the part of Zhoushi, and the part that is not included in the Yellow Emperor's Canon of Medicine. Probably a lot.
Bu Yao: There are three simple things. Today, the Book of Changes is the Book of Changes. In addition to Zhouyi, there are also Lianshan (Xia Yi, lost in the early Han Dynasty) and Guizang (Shang Yi, lost in Wei and Jin Dynasties), which I should have been able to see at that time. There are many other books about witchcraft and divination.
Yao Xing: There are often relevant records in Oracle Bone Inscriptions in Shang Dynasty. There must be more weekly rooms, which should be constantly updated every year ~ ~ ~ and the yearbook should also be put in it. More than half of the six calendars (Huangdi calendar, Zhuan Xu calendar, Xia calendar, Lunar calendar, Zhou calendar and Lu calendar) must be recorded, and how these calendars are gradually improved and evolved.
Not to mention history. At that time, historians didn't eat for nothing. Later generations unearthed the history books written by Wei historians during the Warring States Period, which recorded the history from Xia, Shang and Zhou Dynasties to the Warring States Period. Because it is recorded in bamboo slips, it is named "Bamboo Chronology" (in this case, there is definitely no specific name). The historical books in Zhou Shi should include a variety of royal monographs and records of princes, and the number should be quite large.
What is this? Some bamboo slips recording geography. This estimate is not as much as the above, but it must be quite a lot.
Besides, there are miscellaneous books. These are not easy to classify. For example, Shan Hai Jing. There are many legends about history in astronomical geography. This is a pre-Qin book. It's hard to say whether I wrote it when I was old. However, I must have read some related legends, maybe in other books, maybe in other records, maybe I have read similar bamboo slips that are not recorded in Shan Hai Jing. It's entirely possible.
Generally speaking, too many ancient books have been lost, and many of them didn't have specific names at that time. Later contents were probably collected in other books from the Warring States Period to the early Han Dynasty, and for many reasons mentioned above, it is normal that I didn't read my so-called book today.