A thick, black blob has taken over Plum Street. Judd the cat leaps from his bed, spins, and--Poof! Cat Flash is ready for action! But after some seriously slippery situations, the blob is only getting bigger. Even worse, it's sweeping up people as it oozes down the street! Is there any way for Cat Flash to stop the blob? As the adventure unfolds, striving readers practice decoding words featuring initial consonant blends, as well as -s as an inflectional verb ending and -s and -es as inflectional noun endings. Every Spark Decodables book serves older readers who need practice with foundational literacy skills, combining multiple aspects of the Science of Reading to support small group instruction, independent reading, and reading practice at home.