Can't remember the name of duet book!

[shine11]

Hi all. Hoping someone can help me remember the name of a duet book I used a few years ago for a student. I'm such a div. Keep meaning to write down good books as I always forget what they are. It was an a4 size book I think. About grade 1 (uk) standard and had the pieces the blue Danube, camp town races, when the saints came marching along with many others. Both parts are written simply with treble and bass as normal which is why I liked it. I've searched all over the Internet looking for this for days and still can't find. If anyone knows what I'm going on about, please kindly let me know the name of it. Many thanks!