This Thanos comic book series, titled Thanos #15 and #17, is a valuable addition to any collector's Marvel Comics collection. Signed by the renowned artist and writer team of Jim Starlin and Donny Cates, as well as the legendary Stan Lee, this comic book is a must-have for any Marvel fan. The cover art by Jim Lee is stunning and complements the overall design of the comic book nicely. Whether you are a fan of Thanos or just enjoy collecting high-quality comic books, this series is sure to be a valuable addition to your collection.