No, it does not auto complete, nor should it or any others you didn't do by auto leveling to 50. You have to go to your class trainer and buy the books for your level 39 quests which mean gathering 8 book pages for each then you have to see an NPC as was stated for your level 45 quests. Remember that doing these will award you trait points to spend in whichever lines you have spec'd into.
Originally Posted by Redvers
"There will be no Dawn for Men" ~ Saruman the White