I am not sure this question is appropriate for MO.Some oneSomeone told me that theyTanisaki and Kashiwara have a new book talking about affine flags and schubert cellSchubert cells to calculate the intersection cohomologies and Kazhdan-Lusztig polynomialpolynomials. But he did not remember the title for the book. I searched on googleGoogle but nothing found nothing. Anybody here know?