B physics, now and future

The b-quark surprised us already twice. Unexpectedly large B-meson lifetimes told us that third generation of the quark pair mixed very little with others. The later discovery of large Bo - BO mixing showed us that the top quark mass was much larger than expected. There could be a third surprise, may be in CP violation. In this lectuere series, we quickly review the past and present of B - physics. This is followed by a more detailed discussion on future,in particular CP violation studies with future accelerators.