Source of these pictures is www.saispoorthi.org. It is a book " Sai Bhavana "( Remembering Sai 365 days). It is beautifully done and has good messages with expressive pictures, devotees can go to this link www.saispoorthi.org and know more details.
Thanks to Sai Spoorthi Team for creating such wonderful pictures with so much of message in it . Jai Sairam.