Hi there,
Well it may be advantages for “eloquent” it’s not worth the PAYOLA…
He regurgitates others work and is charging for a book of examples that are not his own, copied.
I suggest you don’t look for a spoon or the “EASY” way around the edge.
There’s no such thing as a Free Lunch, Users need to read ALL the material and Seeed is dedicated to OPEN source, NOT PAY as You GO!
I don’t feel the IMO , Lame contribution is worthy of the coverage, Unless there’s a monetary motivation behind it.(shill)
Others may want to PAY to learn but the info is out there for Free 
You have to do the work.
HTH
GL 
PJ