Where the Wild Things Are by Maurice Sendak -- very good for calming small angry children
In the Night Kitchen, also by Maurice Sendak (cation: the little boy is naked!)
Good Night Moon by Margaret Wise Brown -- for bedtime
And I Mean It Stanley by Crosby Bonsall -- cute
Alexander and the Terrible Horrible No Good Very Bad Day by Judith Viorst -- we all have bad days
Paper Bag Princess by Robert N. Munsch and Michael Martchenko
Bartholomew and the Oobleck by Dr. Seuss