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Read along and re-live the new Teenage Mutant Ninja Turtles cartoon action with Leo, Don, Mikey, Raph, April, and Shredder in these young reader volumes. This volume adapts episodes from Season 2, including "The Mutation Situation" and "Mutagen Man Unleashed."

The Gap series comes to a shattering climax in a cataclysmic showdown that will mean either the survival of all humankind . . . or its absorption and annihilation.   Drifting in space, sabotaged by a crewman tainted with an alien mutagen, the starship Trumpet broadcasts to any ship in range the formula of the mutagen’s antidote—a drug the United Mining Companies has suppressed for its own sinister purposes. Aboard the crippled ship, the fugitives and survivors—Morn Hyland, an ex-UMCP cop, Angus Thermopyle, a newly freed cyborg, and unwilling saboteur Ciro Vasaczk—must make a desperate gamble. Pursued by the UMCP ship Punisher, threatened by the return of an Amnion combat vessel, they will hijack the police craft by any means necessary—and take it back to Earth.

Intracellular checkpoint controls constitute a network of signal transd- tion pathways that protect cells from external stresses and internal errors. Ext- nal stresses can be generated by the continuous assault of DNA-damaging agents, such as environmental mutagens, ultraviolet (UV) light, ionizing radiation, or the reactive oxygen species that can arise during normal cellular metabolism. In response to any of these assaults on the integrity of the genome, the activation of the network of checkpoint control pathways can lead to diverse cellular responses, such as cell cycle arrest, DNA repair, or elimination of the cell by cell death (apoptosis) if the damage cannot be repaired. Moreover, internal errors can occur during the highly orchestrated replication of the cellular genome and its distribution into daughter cells. Here, the temporal order of these cell cycle events must be strictly enforced―for example, to ensure that DNA replication is c- plete and occurs only once before cell division, or to monitor mitotic spindle assembly, and to prevent exit from mitosis until chromosome segregation has been completed. Thus, well functioning checkpoint mechanisms are central to the maintenance of genomic integrity and the basic viability of cells and, the- fore, are essential for proper development and survival. The importance of proper functioning of checkpoints becomes plainly obvious under conditions in which this control network malfunctions and fails. Depending on the severity and timing, failure of this machinery can lead to embryonic lethality, genetic diseases, and cancer.

The situation goes from bad to weird when Nickelodeon's Teenage Mutant Ninja Turtles try to intercept Shredder's latest shipment of mutagen. Boys ages 8 to 12 will thrill to this action-packed novelization that features eight full-color images from the hit Nickelodeon TV show.

The Teenage Mutant Ninja Turtles face a new challenge when a canister of the mutagen slime that transformed them fifteen years ago falls into the hands of their enemy the Shredder.