No they have not. There is the odd book and author that are quality but it seems to be the exception. You can almost always guarantee:
The formatting is atrocious. You will regularly get blurry and illegible images for things like terminal screen shots or else just regular text on a white page that is supposed to be terminal output.
Books often to appear to have not been proof read.
There are regularly pages that have one or two sentences on them. Presumably this is done in order to pad the book length.
As a company they are pure garbage. There is probably no way any independent publisher can put out that volume of books and maintain any level of quality. I believe their business model is simply to flood search results with their titles. In a given year they will put many titles on the exact same subject or tech stack.
The formatting is atrocious. You will regularly get blurry and illegible images for things like terminal screen shots or else just regular text on a white page that is supposed to be terminal output.
Books often to appear to have not been proof read.
There are regularly pages that have one or two sentences on them. Presumably this is done in order to pad the book length.
As a company they are pure garbage. There is probably no way any independent publisher can put out that volume of books and maintain any level of quality. I believe their business model is simply to flood search results with their titles. In a given year they will put many titles on the exact same subject or tech stack.