Patrice, Nate, and Twister the Hybrid Pig-Dog explore the Caves of Moderately Certain Doom and a Few Unpleasant Odors in their search for the powerful, Neighborville-saving Boom Boom Mushroom! Underground gargantuar zombies abound as Paul Tobin and Jacob Chabot take us to yet another secret Zomboss lab! Bonus stories by PopCap Games senior artist Rachel Downing and Motorcycle Samurai writer and artist Chris Sheridan! Bonus stories by two PopCap Games in-house artists!