Today I was farming DM:E in a group composed by me as a tank IGN: Plebiterator, a druid healer called baggenxd, and a mage helping with the dps called ripos. I was there trying to get my Satyr's Bow and, luckily, very fucking luckily, my Foror's Compendium of Dragon Slaying, which has a 0.2% dropchance on bosses and is BoE. (reference: http://db.vanillagaming.org/?item=18401#. ).
Surprisingly, it did dropped, for the first time and most surely the only time in my life, and I was fucking happy, beucase I would love to get me my Quel'Serrar.
Then, this druid, who's not only a ninja, but also a liar, rolled need for it, saying that he needed it for his "main", a "prot warrior". And he did win the roll, and then he dc'd.
Fifteen minutes later I went to the AH, and oh, surprise, he was selling the book already!
Proof here: http://imgur.com/a/iVEzJ
Me, personally, I think that this kind of people is toxic, and he'll not ever get in a group with me or my guild. I very hope so that you do the same and punish this kind of attittude by not letting this kind of people play with you and probably ruin your experience too. As for the people in <HONORUS>, take in mind that this person doesn't think of others, this person only thinks in personal benefit, aside from lying, I bet that he didn't offer the book for any of your warriors, I see that you're a guild trying to progress with your raids and grow, but if you take people like baggenxd, you're going to get bad rep and problems, nothing more than that.