The black man followed Richard to the upper floor of the bookstore with some trepidation, and to his relief, Richard did not expose his "offensive behavior" to the owner of the store, Hardy, and left the bookstore directly.

After leaving the bookstore, Richard quickly walked out of the underground market and returned to the laboratory.

......

Laboratory, main laboratory.

Richard was on the table, lining up the eight books he had bought, his eyes bright, and he had already confirmed his previous guess.

Of the eight books, three are already owned by the "Path to Nobility", and the numbered numbers in the Black Spirit Empire logo are 1, 2, and 25. There are three copies of "My Autobiography - Moratos" that I already have, numbered 18, 27, and 36. There is a book that I already have, "Blood and Fire", and the number is 20. There is also a spell book called Soul Wail, numbered 5.

Together with the books you already have, the results are:

There are five copies of "My Autobiography - Moratos", numbered 9, 18, 27, 27 and 36, which seem to be multiples of 9, which is very regular, but looking at the rest of the books is not like this.

For example, "Towards Nobility", there are currently four copies, numbered 1, 2, 25 and 34. There doesn't seem to be any regular connection between the four numbers.

Another example is "Blood and Fire", there are currently two books, numbered 11 and 20 respectively, and there seems to be no regular connection between the two numbers.

The final "Soul Wail" is numbered 5, so leave it alone.

All in all, the twelve books, divided into four genres, seem to be very confusing.

But when Richard looked at the books, he smiled and said to himself: "It seems that this is really the case, what a coincidence." If it weren't for his previous behavior, it would be really hard to guess. ”

The twelve books of the four genres are connected, and in Richard's view, there is a very close connection.

Take the book "My Autobiography - Moratos", for example, the five numbers are 9, 18, 27, 27 and 36.

So you can calculate it like this:

9+9=18，18+81=99；

18+18=99；

27+72=99；

27+72=99；

36+63=99。

The palindrome counts! What I told the scholar Surrates earlier is the connection hidden in the last page of the book, in the emblem of the Black Spirit Empire!

And what about the rest of the books?

For example, "Towards Nobility", there are four numbers: 1, 2, 25 and 34, so the process of verifying the number of Richriel is:

1+1=2，2+2=4，4+4=8，8+8=16，16+61=77；

2+2=4，4+4=8，8+8=16，16+61=77；

25+52=77；

34+43=77。

For example, "Blood and Fire" has two numbers, 11 and 20, so the process of verifying the number of Richrell is:

11+11=22；

20+02（2）=22。

Finally, for example, in the new book "Soul Wail", the number is 5, then the process of verification of the Lickrell number is:

5+5=10，10+01（1）=11；

Because the final palindromic numbers of 11 and the other three types of books are different, it is a different type of book.

Of course, there are a lot of issues to be aware of.

First, if the so-called number number connection in the book is really the palindromic number and the Lickril number, then how can we explain that there is no knowledge of palindromic numbers and Lickril numbers in the wizarding world at present? At the beginning, the knowledge of palindrome numbers and Lickril numbers was told by him to the scholar Sauradies.

Could it be that the current era did not, but in the past the era of the Black Spirit Empire? In this case, could it be that the original Black Spirit Empire had a higher level of mathematics and other aspects, and after its demise, there was some kind of decline in the world, resulting in a decrease in the level of mathematics?

Second, according to the mathematical definition on the modern earth, the number of palindromes in the strict sense should include one digit such as 1, 2, and 3, because 1 is 1 whether it is read from left to right or from right to left, which meets the definition of palindrome number. However, in the current inference, in the connection between the so-called palindromic number and the Lykrel number, the palindromic number does not include a single digit, the minimum is from 11, and there are many small details in other aspects.

Could it be that the mathematics of the Black Spirit Empire at the beginning was different from that of the earth? Therefore, the so-called "palindromic number and Lickrel number connection" should be "modified version of the palindrome number and Lickrell number connection"?

In any case, for now, the connection does exist in this way.

According to this method, since there is no numerical number above 40 at present, the numbering range can be controlled within 40 to make some calculations.

Under this calculation, during the verification of the Lickril number, there will be 11 palindrome numbers of the Black Spirit Empire version, ranging from 11, 22, 33, 44, 55, 66, 77, 88, 99, 121, and 363 to 11.

In the current situation, "Soul Wailing" with palindromic number 11, "Blood and Fire" with palindromic number 22, "Towards Nobility" with palindrome number 77, and "My Autobiography - Moratos" with palindromic number 99 have been obtained.

The rest is the books covered by the seven palindromic numbers 22, 33, 44, 55, 66, 88, 121 and 363, for a total of 29 numbers.

In other words, the worst possibility is to find the remaining 29 books with different numbers in order to try to unlock the secrets of the White Stone Tower and the Black Spirit King, and the most optimistic possibility is to find a total of 7 books that each represent at least one palindrome number.

There is a long way to go...... There's a long way to go.

Richard sighed and thought to himself.

In thought, it was late at night.

......

Late at night, somewhere in the slums of White Rock City.

The two men walked briskly with their heads down.

The person walking in front was tall, with a majestic appearance and a scar on his face, which made people look vigilant. The person walking behind was extremely thin, and the obscene aura penetrated into the bones, making people look at his life with contempt.

The two walked, walking, talking as they went.

The thin man asked the tall man out loud, "Brother Lance, is that thing you said really okay?"

The tall man responded, "Heter, when did I lie to you?" I said yes, of course. This time, if you pay the entrance fee and successfully join the membership, you will be able to join my subordinates. In this way, I have just enough subordinates to be promoted to deputy minister, and you are considered a full member.

Remember, Haether, President Winkel is a real big man who has a good heart to help us. You can't slack off just because you're a member. You must sincerely listen to President Winkel's teachings and work hard to bring people into the church. In this way, our Black Gold Society can become stronger and stronger, and you and I can have a higher status.

Now I'll tell you again, if you can't pull it alone, you will always be the lowest member. If you get three people, you can become the deputy team leader, and if you get together three deputy team leaders, you can become the official team leader. And then there is the deputy minister that I want to be promoted, and then the minister. Higher, there are the vice presidents, official branch presidents, and vice presidents.

In short, the more effort you put in, the more you gain. President Winkel said that when he became vice president, he would be qualified to sit on an equal footing with him, and he could co-manage the entire Black Gold Society. In addition, Knox's castle and Pist's large territory can also be shared with us. ”

The tall man looked at the thin man, as if he was infected by what he said, and said with burning eyes: "In short, as long as you work hard, you can get ahead!"

Got it?!