In this latest collection, romance is in the air. Charlie Brown''s attempt at flirting in class sends him to the school nurse, while Linus is thwarted in his attempt to woo ''Lydia'' of the many names. Other storylines include Snoopy''s sojourn in the hospital for a hockey-related knee injury, Sally''s bumpy career as a playwright, and Snoopy''s ''kiss-and-tell'' book. Plus Rerun, Spike, Peppermint Patty and Marcie . . . and Snoopy''s feathered Beagle Scouts!