Urag gro-shub don t want to give the book for main quest

[BALD White Men]

I bet this game as first mage and second as archer now I want to try warrior but I am stuck at main quest elder knowledge. I have the option I am looking for an elder scroll and after all talking he go to bookshelf and come to his table and do an animation who shoud put the book on table but it don t appear.
I try to several times to talk with him I spawn the book who shuld give me nothing happend I think is from dawnguard DLC or dragonborn this bug.
I don t know if i can remove then repeat elder knowledge.
I hope I am no stuck here and sorry for my bad english.

[Bomb Bloke]

You don't "need" to talk to Urag, just go here:

http://www.uesp.net/wiki/Skyrim:Septimus_Signus%27s_Outpost