Where can i find brochures about child abuse to mail to someone?

after 20 years of keeping my secret i decided to tell my family about the nasty things my grand mothers boyfriend used to force me to do. he is currently living in her house with my 5 girl baby cousins. i am so worried for them. but my grand mom cut me off and just about everyone else who listened to me and said get him out. i just want to send her somethings she can read. is there any government certified websites that have brochures that can be directly mailed to her house.