I have recieved my first two stickers where do I need to enter the code?

I have just entered to win books good luck to all the people who are entering.

Hi I love reading and yesterday i read a whole book in the morning and today as well! They were big books! I hope everyone is enjoying the summer reading challenge. My fav authors are Enid Blyton, Cathy Cassidy , Michael Morpergo and Roald Dhal. like if you like any of these authors.:)

hi im stuck of what to read