Louis Slobodkin Amazing Space Ship Adventures Set Ship, Apple Tree, Return PB

This is a set of paperback Louis Slobodkin Space Ship books. Included are The Three-Seated Space Ship, The Space Ship Under the Apple Tree, and The Space Ship Returns to the Apple Tree. Books 1 and 3 are in excellent condition, some page edge shelf dust staining, but don't appear to even be read on the inside. Book #2 Under the Apple Tree has a major defect. At some point, some stain was spilled on the book and stained the cover and pages half way through the book. The staining inside is bright yellow and very noticeable. The stain on the cover is seen but isn't as noticeable. It does not smell differently than the others. Still a great set! See pics.