Discovery coupon for free Disney books - has anyone used this?

[extremelychocolateymilkroll]

I've got a leaflet which I can send off for 6 free Disney books and a free Lion King clock. I will then also receive 2 books to return within 10 day trial period at my expense. If I keep these 2 books I will then receive 2 more books every 4 weeks. Now I plan to send the first two books back and would hope not to be sent any other books but have heard of companies really hassling you and sending books whether you want them or not. Does anyone have any experience of this with this company? It's to be sent back to The Wonderful World of Reading and Hachette is mentioned too. TIA