"Without bias" is going to be the trickiest part here, as most of the sources used by modern historians are extremely biased. The war was one the brought out a lot of passion from the people involved, on both sides, and the historiography, unfortunately, hasn't matured enough to really take a critical look at those biases yet. I just wrote my thesis on an expression of this problem relating to the militia.

But that doesn't mean there aren't some good books to start you out.

First, I'd recommend Jon Latimer's 1812: The War with America. It's a broad look at the war primarily from the British perspective, and I think it's important to point out that British perspective is altogether different than the Canadian perspective. Latimer attempts, and mostly succeeds, at putting the war in a global perspective, as a side-theater of the Napoleonic Wars.

Second, I'd look at Donald Hickey's 1812: A Forgotten Conflict. It's another broad-in-scope chronological work that covers things from a very American and a very political perspective. Hickey is reasonably comprehensive, but spends a lot of time navel-gazing about the politics of funding the war which, while informative, are often subject to Hickey's own clear political biases: his writing makes it very clear that he thought the was was justified, and that political pressure against it was not. Worth reading critically, though.

Those are basically the only two broad takes on the war, the rest end up either focusing on a single theater - like the naval war, the Indian conflict, the southern theater, or the northern theater - or on a single idea. I think by a wide margin the two most interesting in the latter case are 1812: War and the Passions of Patriotism by Nichole Eustace, which explores the war as expressed through emotional rhetoric in public and private accounts; and Free Trade and Sailor's Rights in the War of 1812 by Paul Giljie, which looks at the meaning and rhetoric packed into the American consciousness by that pithy slogan.

If you're interested in the conflict from the Native perspective, I'd say the best work to that end is still, despite being somewhat dated, Tecumseh's Last Stand by John Sugden, which tackles some of the persistent myths about Tenskwatawa's native confederacy and its influence on the war.

A somewhat updated by imperfect follow-up would be The Gods of Prophetstown by Adam Jortner, which sets the native conflict with the United States as a religious and spiritual conflict in addition to one of property and sovereignty.

If you want more specific recommendations of other sub-topics, please let me know!