Lots of issues.
1. Ridiculous that he would write an entry before going to see Harry saying that he is going to see Harry. What if someone finds it before he is caught? If it is a friend it puts them in a moral quandary, and if it is an enemy than it gives his location away. Either way it sets up Harry for all kinds of crap.
2. He promised to protect Margaret’s son? Why? We have had no indications that they knew each other, though I think they may be of approximately the same age. If that is the case than we can assume he also knew Justin well as well. I think Jim has a thing (which may be accurate) about people of an age grouping together. Ebenezer has known the Merlin since he was 16, and it sounds like Eb, the Merlin, and Listens to Winds probably ran all over for and against each other in the war of 1812. There seems to be a coterie of people Maggie’s age, and we know the new wardens all hang as a group. Only Harry is pretty much out on his own, which is well explained.
3. He couldn’t find Dresden? Had he not taken any samples before he disappeared to be able to find him? If he hadn’t it seems like he was remarkably stupid in his attempts to protect Harry. If so, and they didn’t work, it indicates there are even more things Harry doesn’t know, since he seems to feel blood is a unpreventable connection method.
4. “That bastard Justin DuMorne got to him before I could. From then on, we could not be sure that the child was not molded to be a creature of Nemesis.” I’m assuming he only assumes Justin got him then, but I find it interesting that, assuming that, he then assumes that Justin was making a tool for Nemesis. It really makes it sound like:
A. He/They knows what Nemesis is and are opposing it.
B. It seems obvious that they should oppose it if they know what it is, but if they knew/believed that Justin was a tool of it, why didn’t they take him out earlier? They wouldn’t have learned it after his death, so they must have known it before. Why leave a known tool of nemesis running around?
C. “we” How many people know about nemesis? Considering that this was a essentially a note to Luccio we can assume she know. Considering he was welded at the hip to the Merlin I think we should assume he knows. How does that effect our thinking?
5. Morgan knew Maggie was Eb’s daughter. This isn’t really a huge surprise if one thinks about it. I mean, if he was of an age with her, it would be a hard secret to keep when they were younger. But it also indicates it is not a well kept secret, so we should assume that at the very least the entire senior council knows.
6. Morgan says the enemy has invaded the Senior Council itself. I first took this to mean that he knew his set up was Nemesis inspired. I’m not sure if he is assuming that person who was framing him is on the senior council (which is wrong, just very near by) or if he has another reason to believe the someone else on the Senior council is infected
7. “A Destroyer” obviously has actual meaning. Not enough info to guess though, other than it obviously ties into him being starborn
8. This is really important – Wizards are innately assholes. It is clear that they live by the “I won’t tell you anything, once you find it out on your own you’re ready to learn it” matra to a stupid degree. Maybe this is a side effect of dealing with fey and the supernatural all the time, but man it annoys me. He knew all of this and more – he must have known something of what Maggie was up to if he made that promise, he knows about Nemesis being the true threat, he knows about Harry being starborn and what that might entail, and he goes to Harry for help and spends days with him, and tells him nothing. What an ass. Especially since learning about Nemesis would have helped Harry in solving the case to some degree, since he would have a better idea of how the enemy is working and thinking. Was shagnasty in debt to a mere mortal wizard such that he had to be a servant in that book, or was shagnasty infected and being driven by Nemesis?
9. Nemesis – Everyone seems scared that if you talk about it, it will learn that you know about it and come to get you. But Harry had that fight with Cat Sith were he revealed to an infected agent that he knew about it, and Nemesis reformatted Sith’s brain and Harry talked directly to Nemesis afterward, and didn’t kill it after that. Nemesis already knows Harry knows about it. Harry should be informing everyone who might be able to help in the fight against it about it. Sure, he has to worry about Nemesis sneaking into his inner circle, but he doesn’t need to worry about Nemesis learning that he knows, because Nemesis already knows he knows. But Harry is too much of a wizard and doesn’t tell anyone anything. Harry should take Fix, Marcone, Laura Raith, Goodman Grey, and Carlos on a walk to the outer gates so they know what they are up against and explain the dangers of Nemesis. Sure, one of them could be infected, but does telling them hurt somehow?