Dunnington's Easy Guide to the Reti covers the London system against the Reti, albeit, more from a white perspective. However, in the London system Black develops his bishop on f5. But Semislav players often also develop their bishop to f5 or g4 against the Slow Slav or Colle. 

The point is that it is bad chess to simply mimic the same sequence of moves against everything White does. In the mainline semislav, Black decides he does not want to concede the centre with 4...dxc4 in order to develop his bishop outside the pawnchain, so he agrees to the "concession" of 4....e6 shutting in the bishop. In the Reti, Slow Slav and Colle, Black need not make any such concession, so he merrily brings out his bishop.

What are the books do you recommend to learn the semi-slav vs. Reti ( with g3, b3 and Gurevich's e3), English, KIA, etc...?