Animorphs flipbook gifs, books 10-18 (source)
I didn’t know I needed this in my life until now.
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Ad for the UK Animorphs books series, found in the inside back cover of Goosebumps UK edition #57, circa 1998.
UK Animorphs bookmark, with quote from author K.A. Applegate on the back (source)
Animorphs ‘Everything Changes’ Post-It notepad, 1998 (source)
Animorphs Doorknob hanger, advertising the TV show on the channels it aired on in the UK. (source)
Megamorphs #1 mini preview book (source), circa right before May 1997 when the book was published. OP of this photo is from the UK, but the styling of this preview book uses the US covers and the US web site url so perhaps it was given out in the US as well.
I have two similar mini preview books: one from the US found in Nickelodeon Magazine, posted here, and one from Australia found in Disney Adventures Magazine, posted here.
Animorphs folder distributed by Scholastic Hippo, the Animorphs published in the UK (source).
‘Meet Animorph Author K.A. Applegate’ article (source) circa May-June 1998 from The Mini Page, a four-page weekly newspaper feature directed to kids but of interest to readers of all ages, that ran from 1969-2007.
Animorphs books #1-5 newly rereleased this year in Vietnamese, from Nhã Nam publishing (source). Animorphs had an original release in Vietnamese too.