Laura Sobiech is the author of “Clouds: A Memoir,” a book that chronicles the final year of her son Zach’s life before he passed away from osteosarcoma in 2013. Her book has been adapted to the big screen in “Clouds,” an original movie streaming on Disney+ this fall. Fin Argus will play Zach Sobiech, and Neve Campbell will play Laura Sobiech. When Zach was diagnosed with osteosarcoma …