"Maybe the assassin could'a been in a hurry, didn't 'ave time tha find it... whatever he was lookin' fer." Ragnar mumbled to himself while the Dwarf walked alongside the shelves, trailing his fingers across the numerous books and covers, although with little clue what he was actually doing nor looking for.
"When killin' people, ya usually don't stay around to scrounge through an entire library afterwards."

In the meantime, Kathlin had retrieved a book from the pile.

It seemed to have been used a lot, its cover worn and scratched, and pages littered with traces of age-old bread crumps, wax and spilled water. Its date indicated that it was the latest in a series of ledgers, cynically dubbed in an eloquent and high-classed handwriting as 'Daily Headaches of the Royal Advisor', and further down on the cover; 'A compilation of notices, reminders and complaints'.

All the pages of the diary looking notebook were handwritten by Alfidious' own fine and luxurious handwriting, with elaborate mathematical graphs and calculations littering the pages. On the sides of the pages were little notes written besides the text, such as 'Remember to remind Guardsmaster Hastor, [X]', 'Have last week's taxation of Old District revised... again'.
Unlike your ordinary diary however, it was mostly concerned isolated incidents within economics, from Alfidious' discoveries of local bars in Stormwind's attempts to cheat the tax system, to even dated series about large, missing sums of money from the Stormwind bank itself years back. 

His three latest entries however detailed three separate cases. The first two were related to taxation and evasion, with his typical, angry notes written besides them 'Notify the fool Hastor', 'Fire District Manager Sebastian!'. The third one, however, was a detailed report on the cooperation between the White Hand and "The Southsea Metal Import company". 
The report detailed Alfidious' interest for the progress of the latter, a chart detailing the two organizations' total purchases and expenditure, as well as earnings and reported treasury, which showed both of the organizations to go in a massive minus.

However, a lot of the report also went into discussing the Southsea Company's seemingly abundant supply of metals, despite having hired almost no manpower at all from Stormwind nor Ironforge to explain their high production. The only people they had officially hired was a dwarf named Dagmar Stoneherder, a seasoned miner and certified Engineer and metallurgist, and his brother, Brann Stoneherder, a former mountaineer and geologist. Notes filled the page on either side, going from 'dwarves still missing, two months beyond contract expiration', 'Possible Horde cooperation?', 'Black Labor' and always ending in 'requires formal investigation!'. 

"Found anythin' yet," Ragnar called back to Kathlin, while mindlessly looking through the pages of a large tax ledger he had found at the bottom of a chest, which pumped a massive cloud of dust up into the air when he dropped it back into the chest!