CREATE TABLE table_15838081_3 (series__number NUMBER, writer_s_ VARCHAR2)

Name the most series number for giula sandler
SELECT MAX(series__number) FROM table_15838081_3 WHERE writer_s_ = "Giula Sandler"
SELECT MAX("series__number") FROM "table_15838081_3" WHERE "Giula Sandler" = "writer_s_"