Stephen King does it again.
In this installment, the Ka-tet is ready to move along the path of the beam, finally scampering their way towards the Dark Tower- the overarching goal of the series. Though excellent, it should be read as the fourth book in the cycle, not the first. To understand what is going on, you need to read the rest of the books, otherwise you will be lost.
This particular installment is mostly centered on the background of Roland Deschain of Gilead, the Last Gunslinger. His past is riddled with conflict, romance, and hidden atrocities that paint the character as he is in the modern setting. The amount of material covered in this volume is astounding, yet it gives equal opportunity to all the various plots, so that they each shine.
A fantastic addition to the series, Wizard and Glass should be read in all its shining glory. It's one of King's best, and is thoroughly enjoyable the whole way thorough. 5/5, would read again.
(Review is short, so as to not spoil anything)