My father (who struggles in vain to preach his politics to me still) has gifted me a big heavy box full of books with Wayne LaPierre's signature on the front, printed by Palladium Press. These are part of the "Library of American Freedoms". I haven't looked into them super well but from what I can understand these are all re-prints of much older books.
Are these books still historical, despite their clear endorsement by a lobbyist? I cannot find if anyone has checked to make sure the text is not altered.
Could you give us the specific authors and titles? There are a lot of titles in that series and a lot of variety. The American freedoms primer : A citizen's guidebook to the most celebrated declarations of American liberty, by Les Adams, is something you would expect being signed by LaPierre. But Frederick Douglass' two-volume memoir is classic and will never go out of date, as is Two Treatises on Government by John Locke, Common sense; and The Rights of Man by Thomas Paine and Democracy in America by Alexis de Tocqueville. And The Ideological Origins of the American Revolution by Bernard Bailyn is good, even at 50 years old. But Bailyn himself some years back expressed some doubts about the 2nd Amendment's relevance to individual gun rights, so it's possible if that book was in the set your father might have thrown it out by now.
I doubt that they bothered to really edit or change the actual text of the books.