Does anyone know of any official Lore that explains events between Oblivion and The Infernal City

...the book itself.

No, seriously, your best bet is to read the book yourself. There hasn't been a good synopsis made yet, and the ones that have been made only explain the bare minimum. I don't expect a synopsis to be made until after the second book is released, because the second book picks off right where the first one left off.

yeah i am reading the book...

... but it doesnt give much information about how things happened rather that they just are

Well in that case I'm sorry to say but the only explanations and details you'll find are in the book. If there isn't an explanation in the book, then there isn't an explanation anywhere.

By the end of it most major events wind up getting explained. Vvardenfell , the Septim Empire fell, some badit warlord crowned himself Emperor, the Argonians formed their own Empire under the Hist and , the Aldmeri Dominion rebuilt itself, and everyone pretends the Iliac Bay isn't there because it's probably back to pre-Daggerfall stuff.

i wonder if Bethesda release some detailed lore within TESV which references that 40 years

i fully intend to re-read the book and look-between-lines, the book is quite fast paced and no doubt i will again re-read it before the next book is released

Nobody gave a crap about the Iliac Bay anyway, aside from Daggerfall players. Though it's probably degraded back into its fragmented state (or at least with some of the more prominent lesser kingdoms such as Anticlere and Ykalon regaining independence), I would still consider Daggerfall to be a major bastion of empirical power and Wayrest a major bastion of commercial power.

The major Breton character, Annaig, seemed very loyal to Imperial ideals and government. It's a bit odd considering she was raised in Black Marsh, but she may have learned Imperial values from her father, implying that the Iliac Bay region and its people are still committed to a unified Tamriel during the events of the Imperial Civil War incident.

HA. No. If that's the case then you don't know the Illiac Bay.

From a non-mythic, mundane storytelling perspective, the Illiac Bay is the most interesting place in Tamriel due to the crazy power-politics and dizzying array of factions and memorable individuals scheming against one another. That Keyes didn't take advantage of some of that juiciness is an unfortunate consequence of his limited time working on the novel and StoneFrog's silly sentiment (unfortunately shared by many) about it being irrelevant to anybody except the "Daggerfall players"; a post-Morrowind revamp of the Bay could be a very compelling setting, indeed.

Not to start an argument here, but Daggerfall was my first TES game and still is my favorite of the entire series. What I'm saying is that both Bethesda and much of the fanbase seems to have cast it aside, barring historical reference to the Warp in the West. Of course, this is like saying Bethesda doesn't care about Pyandonea since so little is known about it, but I oft have this hanging paranoia that Bethesda is trying to draw emphasis away from that region.

Still, Gothryd (though not to the extent that Lysandus was) seems to be fairly pro-Empire, or at least not resisting it. Considering a strong concentration of Blades organizations and a region littered with fragmented sects of the Imperial pantheon (not necessarily a bad thing), I think it could play a pivotal role in future lore. But only if Bethesda decides to re-locate focus on the West, something which hasn't been done in a while.

I'd find it easier to know the Illiac Bay if it didn't require a degree in computing just to figure out how to install and run Daggerfall.

Now I remember why I hated the nineties.

One of my favorite parts of TIL is the Daggerfall books and storyline pages. Much as I love Daggerfall I can only rarely play it.

As for the mythic significance of the Iliac Bay, let's take a look here. Putty's right that as far as human drama goes it wins, at least so far, as the best storytelling location. But could you look me in the eye and say the place where the superdreadnought space vessel of the gods landed and still stands is mythically unimportant? No, not a chance in hell. It's important, it's just that the majority of the mythic lore (which is NOT all of the lore) was written after Daggerfall so we don't have that perspective. Maybe someday, if they break into the Wii or DS market with a TESA or TESL game we'll get that, or maybe book 2 will give us that, but we don't have it yet.

What little that has come out has been interesting. Lhotun setting up a third political power in Hammerfell (well, inevitable if he wanted to sustain power after the TLC Redguards got in Redguard), Wayrest and Orsinium allying (you know Daggerfall is going to start hurting soon). It's a consequence of having to at least sustain momentum from previous games. What would you have them do? Have another game dedicated to the setting? Then they'd be accused of retreading past glories.

To put it another way, you could argue that Bethesda has been ignoring the Summerset Isles because barely anything has been said about them outside of the Pocket Guides. The truth of it is that they are more or less leaving it open for when they have to examine it up close.