The Sliding Surprise books are proven best-sellers, with over one million copies sold! After years of research, PSS! has figured out how to produce these favorites at a lower price. The four new titles, Who's Bugging You? Who's Hatching? Who's In The Sea? and Who's There? once retailed for $9.99. But now they are available for $7.99--without changing the quality or trim size! Stock up on these time-tested, interactive kid-pleasers. The only thing...