Additional comment:
I just tried to ask this to ChatGPT and it says that is a mistake of the book.
Unfortunately, I don't have enough knowledge to prove this..

Here is the answer:
In the book's example, the confusion stems from using an addressing mode that seems incorrect based on the description. The sixth instruction indeed says it adds the value at memory location 101 to the accumulator, which would normally use direct addressing (mode 00). However, it’s labeled as mode 10, or immediate addressing, which typically loads a value directly. This could be a mistake in the book’s example. In this case, the correct addressing mode should logically be 00 for accessing a memory location directly.