My Quest is hard you need to find a book in the throne room do you have to be a certain level im level 20
Yes. You must be a certain level to enter the different areas in Grizzleheim. This might help:
Quests to Return to Grizzleheim:
Level 20 – Trade Voyage (go to Northguard and Savarstaad Pass) Level 25 – Lending a Paw (go to Vigrid Roughland) Level 30 – Full Grizzle Jacket (go to Mirkholm Keep) Level 40 – The King and I (talk to Valgard GoldenBlade). He gives you “The Bigger They Are” (go to Nidavellier to defeat Jotun)
Then comes Ravenscar and Wintertusk.
The books that you are looking for are usually with the "last boss" in each area. The King in the Throne Room will be open to you at Level 40, if you finished all of the other areas first.
My Quest is hard you need to find a book in the throne room do you have to be a certain level im level 20
You just got the ability to go to Grizzleheim. Come back in about 10 levels or so. Grizzleheim is optional, the rewards minimal and it isn't too easy either (though you don't say what school you are). Certain areas of Grizzleheim are level restricted as well.
