I'd suggest a better differentiation between Best and Breadth First Search in the Graphs section.

Acronyms BFS and DFS are used all over the place, but "breadth" and "depth" aren't mentioned anywhere, making it hard for a newcomer to understand what is being referred to.

In the Transform Tree example here
https://glom.readthedocs.io/en/latest/snippets.html#transform-tree

the code uses Ref

"With an arbitrary depth tree, Ref can be used to express a recursive spec."

and gives a code example

etree2tuples = Fill(Ref('ElementTree', (T.tag, Iter(Ref('ElementTree')).all())))

I'm using glom 19.10.0 and it doesn't come with Ref

from glom 

Don't mean to be that guy, but in the Comparison section at the end of the starting paragraph, it says marcos when it should say macros.

Check the repository

You can find the book here

Go to any unsolved chapter solve it's Programming Projects.

Keep .java file in the correct folder and update the ReadMe.md accordingly.

Add a PR 😄 and be a contribu

It is Result<u32>, not Result<()>, but the documentation does not tell what that number (u32) means.

Should add something that says

Installation

npm install --save readdir-enhanced

This would help identifying the npm repository as genuine.

At first glance this project seems to be quite similar to sanctuary-def. A summary of the differences between the two libraries would be useful. :)