 If you liked
Kaze no Tani no Nausicaä
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 ...then you might like
Sabaku no Tami
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As stated in the description of Sabaku, it is something of a prototype to Nausicaä, featuring locations, factions, character designs, and even plot points that are later used in Nausicaä and much more fleshed out and developed. Both works are tied together by the central theme of 'the tragedy of war', and are great reads for fans of Miyazaki.