These were inherited & kept for my son but unfortunately he has not been interested in reading them & has now out-grown the genre. Would suit 7-10 year olds. The bindings are all good quality. It is a series of 6 plus another similar size/shape. Titles in order are:

1. The world of nature
2. The world we live in
3. The world of the past
4. The world of science & invention
5. The world of arts & pastimes
6. The school companion First published 1957, reprinted 1960. *Blue book next to them in photo has been sold, not included in this set. Pick up is in Fitzroy.