The dangers of re-reading a book

Good morning bookies!

Bright sunshine today in West Tennessee, but cold, high 30's, which to me might as well be Antarctica.

No link today, just a passing thought. I guess you all know I'm researching a book dealing with World War II. Whether or not the book ever actually gets written, I don't know, but I research it daily. Last night about 11:30 I was re-reading (for the umpteenth time) The Last 100 Days by John Toland, a book I probably could repeat large swatches off by heart. And what did I suddenly find that I had never found before? A major error. How could I have missed it? Moreover, how could his editors have missed it, not to mention the historian himself?

On page 205 he mentions that Sepp Dietrich's Sixth Panzer Army had lost 30% of its tanks and AFVs attempting to relieve Budapest.

Ummm...no, it didn't. Budapest fell on February 11-12, with breakouts continuing for a few more days by small groups. The three relief attempts in January and February were all carried out by Sixth Army, commanded by Hermann Balck, not Sixth Panzer Army commanded by Sepp Dietrich. Sixth Panzer Army wasn't even fully in Hungary yet and did not actually fight in that area until the offensive on the Gran River later in the month. How had I never noticed this before? And how many other errors have I overlooked in this book?

It just goes to show you that re-reading a favorite book isn't always a good thing.