In the Digital Circuits textbook > Ch 8 - Karnaugh Mapping > Boolean Relationships on Venn Diagrams page, in the section with "Example: Find (A+B’)’ ", there's a mismatch between the text and the image. I've highlighted it in the screenshot below:



The text says "the AB' double hatched result..." and "AB' above left and right..." but I think these should be "A'B".

Also in the Solution text in the screenshot above, there's the phrase "Moving on to a to, (A+B')'..." which doesn't make sense.

 

In the Digital Circuits textbook > Ch 8 - Karnaugh Mapping > Sum and Product Notation page, there might be an unnecessary expression in the Terminology for Maxterms section.

The highlighted 'Out' expression in the red rectangle below looks like it's unnecessary, inaccurate and can cause some confusion:

 

In the Digital Circuits textbook > Ch 8 - Karnaugh Mapping > Don’t Care Cells in the Karnaugh Map page, I think that two Karnaugh maps have incorrect values in them.

These are the Karnaugh maps for L3 and L5. They have additional '1' values when I think they should be '0' instead. I've highlighted them in the screenshot below: