Shame on me. I have not noticed that in some moment (unknown - in which) in skills appear "mana shield". And he - work different (given on 30 min, no disappear when over mana, no need to read book or scroll) - all ok. The only thing that is interesting. On what level of mage they appear.

i know, in normal diablo 1 - they (book and scrolls) regularly available in store - but in HD Mod - there is no one time, that they were there.

In Diablo HD Mod have corrected the point of books Mana Shield in the game for a Wizard? because it does not appear in the store to buy any book or scroll.