Nov 2, 2018 - 7:37 AM
Hi-- I've not done this mountain, but this link will provide some information to start, including guide books, although most are in German. Note that this is a technical climb that requires rope, axe and crampons, and the ability to use each. Depending on your level of expertise, you may wish to consider hiring a guide in Grindelwald.
BTW, Kev Reynolds' guide books are terrific, but he is more oriented to hiking and doesn't to my knowledge cover technical climbing routes. Concur with Slowpoke as to timing-- the route may still be in winter mode in June.