This science fictional mystery was meant to be the beginning of a series. First publication was in a short-lived Random House book club edition illustrated by Deeter, then simultaneous hard/soft from Knopf with illustrator Obrist. I know that’s confusing. At least it confused me!
![Cover of Robot and Rebecca: The Mystery of the Code-Carrying Kids by Jane Yolen](https://www.janeyolen.com/wp-content/uploads/2019/01/robotarcck.jpg)