Justin Bieber's Halloween Sunday Funday

Drawing an end to a busy holiday weekend, Justin Bieber tended to work duties as he held a book signing at Barnes and Noble in Los Angeles, CA on Sunday (October 31).

Looking studly in an all-black ensemble complete with black-rimmed spectacles, the "Baby" hitmaker posed for pictures before sitting down to sign copies of his just-released book, Justin Bieber: First Step 2 Forever: My Story.

Tweeting about the day's doings, Justin wrote to his millions of followers: "so far Halloween SUNDAY FUNDAY has been epic. woke up and played some ball, now off to the book signing, and then #HAPPYHALLOWEEN"

As for his new book, Justin Bieber: First Step 2 Forever: My Story is "an illustrated tome telling the behind-the-scenes story of his journey to superstardom, with the help of never-before-seen photos of the Canadian heartthrob."

Enjoy the pictures of Justin Bieber at his Barnes and Noble book signing (October 31).