Romulus, as you are relying on Bennett and Percy for your information, did you perform the one simple test that any able-bodied and sighted person can do on their book?
Assuming that you did indeed use your intelligence and laid straightedges along the tree shadows (and I mean the shadows, not the white lines provided) on page 22 of "Dark Moon," what did you find?
How does that agree with the statement on page 21: "Take a look at (19) and (19a), pictures of typical tree shadows. Notice the parallel lines of shadow..." (My emphasis.)
Do their converging shadows indicate something to you, such as Percy and Bennett laughably attempting to fool gullible readers?
Please tell as that you have performed that test, and your results. Are the shadows indeed parallel as claimed? Are Bennett and Percy reliable?