Never too young
You're little one is never too young for a story and it's such a great habit to get into with them - reading a story before bedtime (yes...even to a newborn - don't feel silly) will help this to become a sleep cue for baby that will last throughout their entire life and is a great bonding time with them too - reading is an important life skill so promotion of this from a young age can only be beneficial. Stick to one/two stories and stay consistent with this number...otherwise you'll find you're reading 10 stories a night as your little one becomes better at bedtime negotiation and delay tactics!! What are your little ones favourite books??