Photo of two books. According to the condition of the contest you need to guess "men" books on the cover.

Resistance of materials

Q: You are close to the truth.
But you are lazy to open comments :-)
Lack of options was...

H: Well real day comments to read (
This is Landau Lvivitz.
There are no more men’s books.

Q: The previous version was warmer

X: What could be warmer than quantum mechanics

Ahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
The warm lamp of quantum mechanics.

X: I opened the first volume of Landau-Lisvic and at the very beginning saw"Let’s take Lagrangian" and closed)

K: No, Noacho, I took Tom Berry and Lagrangian. It is not serious :-)
You must be able to take responsibility for your actions.

X: I can’t take Lagrangian
My mother does not allow me.