Grimm S6 should not be the last

Not only do I watch it every night when it airs, If my employers schedule me, during air time, I watch it the next day, Either on NBC.com or on Hulu. I also, have the Grimm Book of Wessen and I WISH you all would make the second one... of the Wessen that are crossed out in the table of contents. I wish you would make All the keys for us to get as well.
The higher ups are ALWAYS getting Rid of Very Good shows, in the viewers opinions. This is one of the BEST you've had in a While ! Why Can't you have it Last for years ?? PLEASE, Don't Get Rid of it, to make way for another New Show we Don't want !
This show is AWESOME and the items you have to go with it are great. I also have ALL the Seasons on DVD!! and watch them OVER and OVER and Over, UNTIL the Season starts !
PLEASE DON'T Kill off GRIMM!!!
P.S. I'm 51 and LOVE, LOVE, LOVE This Show !!!
Please Don't make season 6 the last for Grimm.