On a scale of cotton candy to Brussel sprouts, The Snakebite Letters by Peter Kreeft is an imitation vanilla. Although a familiar flavor, it's not the original, rich flavor.
I started The Snakebite Letters with interest, intrigued to see how someone would write a book that copied the idea of C.S. Lewis. Overall, I was disappointed because Peter Kreeft sometimes forgot to stay in character through his letter, and honestly, it seemed very preachy to me rather than chilling. I admire Kreeft for even trying to recreate something done so well the first time, but honestly, go to the original if you're looking for a bone-chilling read.
Unfortunately, due to the lack of characterization and the long-winded preachiness, I stopped reading this book before finishing.