"Reading one book is like eating one potato chip." - Diane Duane

You can't!  Who the hell eats one potato chip? 
I mean, if you have the chance, why not stuff your face? Do you also eat one piece of chocolate? One bite of cake? 

If you can withstand these temptations, I must congratulate you on being the first alien ever discovered. Let me turn you in to the police now, you inhuman beast. 

Meanwhile, I will be stuffing my face with sweets and books.