Green Hills of Stranglethorn Bugged

[Arthos777]

I have all the pages for Chapters I, II and IV but when I try to turn them in to Barnil Stonepot it shows these quests are not complete. How can I complete this? Please see screen shot below.
https://imgur.com/a/PPlQLaQ

[Lothradis]

Try relogging. If that doesn't work. Try abandoning the quest, then picking it up again.

[Arthos777]

Thanks Lothradis. Dropping the quest and picking it up again worked!! I should thought of that.