I gave my parents a very brief, very basic print out on FtM transsexualism and G.I.D.. I gave them a rundown of what i planned to do. I gave them a very brief overview of testosterone therapy.
My mom said i gave them too much. Go figure. But i know my parents and if i hadn't given them anything but a "well, i'm pretty sure i am trans..." paragraph then they would have likely poo-pooed it and told me i was just "under stress" and "the feelings would go away."
After they read the letter they had no choice but to accept that i had these feelings, and that they weren't just a passing thought. I did my "homework", so to speak, and knew what i was talking about. Now we're in limbo, i guess - they saw a therapist last Wednesday and came home a bit lighter (though they've bee grumpy most of this weekend - i'm a bit worried that the therapist gave them false hope without ever talking to me... i get to go in on Tuesday, joy.)
I'll probably look into some of these books to give them.
They want "baby steps" which seems to be NOT working (don't know if you read my post but they took my underwear *sigh* and they don't want to hear anything i say about the issue.) Ah well, we'll see what Tuesday brings.
Good luck to you!