Tur'ajaran Tome - It adds the bonus to the caster of a spell too!

Tur'ajaran Tome - "Friendly warriors add the wielder's attack bonus (if any) to their counterspell rolls"

Consolidated Rules page 17

PROFICIENCY: COUNTER SPELL
Warriors with the wand attack type can use the counter spell proficiency to cause an opposing sorcerer’s spell to fail. To use counter spell, a warrior cannot be
in base contact with any opposing able warriors, and it cannot have any action tokens.
Counter spell is used during an opponent’s turn; it does not require an action. Announce that you are
using counter spell after a target spell’s element or card has been placed on the battlefield, but
before the target’s spell text is executed. Only one warrior may attempt to counter a given spell.
The controllers of the casting and countering sorcerers each make a counterspell roll. The casting
sorcerer rolls two six-sided dice and adds its unmodified attack value (including attack bonus, if
any) to the result. The countering sorcerer rolls one six-sided die and adds its unmodified attack
value (including attack bonus, if any) +1 to the result. If the countering sorcerer’s result is
greater than the casting sorcerer’s result, the counterspell succeeds and the target spell fails. Return
the target spell’s element (if any) to its spell card and put the spell card face down on top of its stack.
If the counter spell attempt fails, the target spell resolves normally.
Spells called counterspells enhance a sorcerer’s use of counter spell. Only bookmarked, face-up
counterspells may be used. Announce and reveal a counterspell as part of using the counter spell proficiency.

scenario:

Zombie Baron (unmodified attack rating of 13) and Scholar Maleficius is wielding Tur'ajaran Tome (+4 attack bonus) = Zombie Baron has a 17 attack rating for casting spells?

Yes...

yes sir dats 17 +1 for counterspell proficiency plus kung may deny or the likes dats +2 dats a whooping 20 counter with out the dice roll

nice!