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A yellow book with the 'For Dummies' trademark on its cover.
Upon activation, Isaac will gain the same effect as Spoon Bender for the duration of one room.
This gives Isaac the ability to shoot homing tears. These tears are colored purple and are able to change their path to pursue enemies.
- IPECAC: Ipecac projectiles will home in on enemies
- Dr. Fetus: Bombs will home.