It seems the even-numbered notebooks are missing - where are they?

[MaxMenzies]

Notebook 0 reads the following below. But I can only see odd-numbered notebooks, and not the even-numbered notebooks that presumably dive into the actual details. Neither are labelled ML or Tools, but I presume the odd are the ML and the missing even are the Tools.

"The following notebooks will walk you step by step through the underlying math and machine learning concepts you need to know in order to accomplish this classification.

"They alternate between two different types of notebooks: those labelled ML (Machine Learning), which are designed to give a high-level overview of the concepts we need for machine learning, but which gloss over some of the technical details; and those labelled Tools, which dive into the details of coding in Julia that will be key to actually implement the machine learning algorithms ourselves."

[j-user365]

I have the same problem! It also feels like the part on juliaacademy.com is incomplete, but might be a result of the missing notebooks here