God did not promise to protect "any" other books. Not bukhari or any thing.
Okay, so if we dis Bukhari/Tirmizi/Muslim cause those books are not PURE anymore that could you kindly tell me how would I perform my salaat then. You might know Quran better than me but I dont remember anywhere in Quran where it teaches how to perform Salat, how many rakaat, how to perform wudoo and all that good stuff.
Quran is the best book but you cannot follow that book by dissing Hadith and Sunnah, cause that is the practical application of Quran, a demonstration on how to follow .. if you may