Australian children's book illustration considered it "undoubtedly one of the most outstanding Australian books of the immediate post-war period", while the biographical dictionary Twentieth-century children's writers described it as "a straightforward, amusing, uncomplicated description of a little girl "who lives in Australia/ With her toys and her pets and her paraphernalia" [which] has proved to have the most universal and lasting appeal" of MacIntyre's books. Other non-fiction works which followed Katherine were Willie's Woollies: The Story of Australian Wool (1951) and Jane Likes Pictures (1959). MacIntyre visited a sheep station near Coolac, New South Wales to make sketches for Willie's Woollies, in which she also showed processing in woollen mills and garment manufacturing. The illustrations and text had previously appeared in strip form in The Age newspaper's children's section; colour was added to the drawings for the book. Reviewers thought it excellent, "[i]nstructive as well as amusing ... [with] most expressive drawings"; "done gaily and simply with colored pictures and a minimum of words. .. combines fun with information". MacIntyre also produced a project sheet about wool for junior school students which was published by the Australian Wool Bureau in 1953. Jane Likes Pictures was inspired by MacIntyre's daughter's interest in art, and her friends who firstly found her odd, and then joined her in drawing. It was intended to introduce young children to drawing and painting, and reviewers considered it "delightful"; "a happy book that makes drawing fun"; "of immediate appeal ... an original and stimulating approach to art for the very young .. [with] a nice economy of words in the text and of line in the illustrations. The "tricks that are easy to do" ... will no doubt lead to some hilarious moments when the young try them out." MacIntyre's training and experience in commercial art contributed greatly to her success as a children's illustrator. MacIntyre herself said, "Children's books have to be simplified, and simplified. ... The idea is to say what the picture doesn't convey, and vice versa. I had good training ... in an advertising agency. Often there was only two or three inches in which to convey all about a product and use an illustration." Fictional picture books Mr. Koala Bear (1954) was another of MacIntyre's fictional picture books for young children, about an elderly koala who is unexpectedly visited by two young koalas, who believe he is their uncle. It was commended