Goosebumps Books #25 - #28

From Author Wars - https://authorwars.com/publications/goosebumps-books-25---28-15814.html

Overview:

Title: Goosebumps Books #25 - #28
Author: R. L. Stine
Year: 1998
ISBN-10: 0590223704
Publisher: Scholastic
Price: $15.96
Binding: Trade Paperback
Type: Collection
Title Reference: Attack of the Mutant
Notes: Assumed first edition of this collection of four novellas, published as a boxed set. This entry is for the initial printing. Data from OCLC/WorldCat and unspecified sources. Cover art credit from the title's parent. The cover artwork reprints that of volume #28.