There seem to be 2 typo erros in the colouring chapter in graph theory:
P270 of the pdf textbook, the table of Example 4.4.3, KQEC is shown close to KQEB in its column, but not close to KQEB in its row
P273 of the textbook, the table of Exercise question 4 (b) , A is shown conflicts with CFJ, but J is shown not conflcts A, while I is shown conflicts A
Coloring chapter typo error