Shadowrun. Secrets of power. Book 2: Choose Your Enemies Carefully

The search for his sister on the dark and dangerous streets of 2051 led Sam Werner across the ocean to the UK. There he encounters an insane druidic cult that wants to control nature and strives for power.
Realizing that the Druids must be stopped, Sam enlists the help of old friends and new comrades. But this is not enough. To gain the power he needs, he must embrace his identity as a shaman. After all, what awaits him in the final confrontation is much darker than everything he previously encountered in the shadows...