Why Does the Fischer Projection of Glucose Show Carbon Atoms with Five Bonds?

[Asmaa Mohammad]

Hello,
my book shows this figure of Fischer formula of D-glucose

I don't understand this figure, and I wonder why the upper carbon atoms in both the right and left formulas have 5 bonds.

And from where comes this hedrogen atom in the upper left side of the figure (attached to alpha, D-glucopyranose).

When turning D-glucose to Fischer formula, it seems there's an additional hydrogen atom, isn't it? Why and how this happens?!

Could some one explain for me how the aldehyde form of glucose (the middle structure) to the beta, D-Glucopyranose and the alpha, D-Glucopyranose?

 

[DrDu]

Burn that book!

 

[Asmaa Mohammad]

@DrDu
Why?! It's the book which the biochemistry department in my college provide, and the book I'm supposed to do my final exam according to it.
Could you please give a further explanation? And hopefully you explain for me where is the correct and wrong parts about Fischer formula of glucose!