As a result of student feedback we have been advised of issues with Version 19 of my FAA 107 UAG Remote Pilot Study Guide, in the print and e-book editions.
The currently available editions (Rev 20) contain the corrected items.
Amazon Print Edition corrections rev 14: (6 x 9)
BooksAMillion Print Edition corrections rev 19: (8 x 10)
EBook: (Smashwords, Amazon, iTunes, etc.):
Those who purchased e-book versions can simply delete it from the library and download it again in the current version (Revision 20).