I haven't read the first one and I'm 2/3 of the way through Lincoln Unmasked. The basic premise of Unmasked is how the "Lincoln Cult," as DeLorenzo calls them, has for years been changing who Lincoln was to fit the political agenda they desire. Since Lincoln is seen by many to be a hero and the greatest president, if they can get us to believe he did something, it will be good. Basically, if Lincoln did it, it must be right.
For example, Lincoln was never a Christian. It fit the agenda to make him so. Another: He was never anti-slavery. In his first inaugural, and when he first took office, he was very much in favor of a Constitutional amendment that would forbid the federal gov't ever getting involved in the issue of slavery. He was more pro-white. Lincoln attempted to re-colonize all blacks out of the states. Ship them all to Africa or Bermuda, anywhere but in the states.
The reason for The War of 1861-1865 had nothing to do with slavery. It had to do with the Morrill Tariff passed in 1861. This was a protectionist tariff that benefitted the North and hurt all agricultural areas. Not just the South but also the northern Mid-West. Lincoln, in his first inaugural said, "The power confided to me will be used to hold, occupy, and possess the property and places belonging to the Government and to collect the duties and imposts; but beyond what may be necessary for these objects, there will be no invasion, no using of force against or among the people anywhere." Basically saying that he will fight to collect the tariffs from the South. He kept his promise.

Lincoln was a great inflationist. He believed firmly in the central bank. This was the core platform for the Whig/Republican party (when the Whig party collapsed, it was simply replaced by the Republicans that kept most of what the Whigs stood for). While in Illinois he fought hard to get banks the ability to not pay specie (notes immediately redeemable in silver & gold) and opt rather for a fiat currency that could be used to gain political power and keep it by spreading the money to their friends.

That's just some of what DeLorenzo goes through. In Unmasked he mentions some quotes that have been attributed to Lincoln. He mentions that a gov't cannot self-regulate (they will not limit their own power). So having a supreme court as the final judge will not, in the long run, side against their own gov't. The gov't has it's own propaganda machine: The Public School System. Those that attend are indoctrinated to believe the war was about slavery, Lincoln was anti-slavery, Lincoln saved the Union, etc. Lincoln, far from saving the Union, actually destroyed the Union that was there. At the core of the Constitution and Declaration of Independence was Secession. The 13 colonies seceded from England. The 13 separate colonies agreed to have a federal gov't only if they could leave if they didn't like it.

Well, this post is long enough. Hope that's enough to whet your whistle.

I noticed Abe wasn't in your Top 20 Worst and he wasn't in your Best 5-10. Does that mean he's one of your Best 4? To see why he should be one of the Worst 5 (if not the Worst #1) see Thomas DeLorenzo "The Real Lincoln" and "Lincoln Unmasked."