Okay, so far this page is just here so that I have somewhere to put the book covers of books I don't have.  Wrinkle in Time etc have been published many times with lotsa different cover art - some good, some only ok.  Here are the covers.  Most have links to bigger versions.

FYI:
Swiftly Tilting Planet cover from first row used as box set cover.
Huge pic of the whole jacket of first edition of Many Waters (from fifth row).

Never seen this Wind in the Door cover before.

Here are the original pub dates:
A Wrinkle in Time - 1962
A Wind in the Door - 1973
A Swiftly Tilting Planet - 1978
Many Waters - 1986

This is the cover art I grew up with.  They will always be the first to me.  I really like them.  Especially the one for Swiftly Tilting Planet.  These are my scans.
These are fairly recent mass market covers.  I think they're wonderful.  They are covers for a Mass Market paperback edition.  I have A Swiftly Tilting Planet and A Wrinkle in Time, but I want to get the other 2 before this edition disappears from retail.
These are trade paperback coves.  I want the boxed set.
Can't seem to find matching Many Waters.    Had Many Waters even been written yet?				Waters
I think these are the first editions.  I don't know what the first edition of Swiftly Tilting Planet looked like. (Wrinkle in Time cover is original 1960s FSG dust jacket designed by Ellen Raskin.)			Swiftly
Trade paper.  Only ok.  Can't seem to find matching Many Waters.				Waters
These are the current trade paperback coves.  I think they're really terrible.  And I'm really not sure why it was so much harder to get a cover image of Many Waters than it was to get the first three in this row.

Books by Madeleine L'Engle

(O=own, R=read, E=enjoyed)

Links

• Official Site of Madeleine L'Engle
• Fan Page
• Cover art of Rowena Morill (see #84 on Rowena's page)
• Bibliography with years of multiple editions!
• Fantastic Fiction (A favorite resource.)
• Sci-Fan Site (Another useful resource.)
• Global Network of Dreams (Other authors you might like.)