Russian verbs

It is a very comprehensive and didactic work that can disentangle the Russian verbs.
However, I tried at first to read carefully from beginning to end and I do not recommend this mode of use: I almost gave Russian!
I want to locate my low: I'm about a third of the Assimil method. I imagine that, unlike me, Russian speakers confirmed easily spend aspirin reading this manual!
That said, I can at any time, but occasionally (!) Of great help.