THE SIXTEENTH RAIL : THE EVIDENCE, THE SCIENTIST, AND THE LINDBERGH KIDNAPPING
by Adam J. Schrager

Arthur Koehler was a xylotomist with the US Forest Service in Madison, Wisconsin. He was considered the most eminent expert on wood identification. After the Lindbergh's baby was kidnapped, Koehler was tasked to investigate the wood in the ladder by the New Jersey State Police in 1932.
I did not finish this book as I found it to be excruciatingly boring. Unless you're into all the nuances of wood with all of its distinctive markings, you might be interested. The most egregious thing that I thought was disturbing was the amount of times the word "kidnapping" was misspelled. That's pretty pathetic considering that is what the book is about.
It's hard to believe that the author has received numerous journalism awards because I found the writing to be plodding.
Not recommended.