This is an eBook. If you don't have one of the eBook-devices (Kindle, Nook, etc.), the latest Apple operating system, Yosemite, allows you to download eBooks to a Mac via iBooks. If you aren't acquainted with Youthly Puresome, it's worth the modest price to become so. If you are, now you can have his entire oeuvre at your fingertips, including some material that hasn't been published. Note that this blurb is from iBooks; it is also available on Amazon (Google "Woodul Amazon").
I'd write a review but I can't do better than Barrett Tillman's on Amazon:
By Tommy H. Thomason
Thursday, January 8, 2015
The gun sight statement suggests one reason why something so obviously beneficial in a crash wasn't implemented before then. The prewar sight in both fighters and dive bombers required the pilot to lean forward.
And also to use his plotting board.