
Hawkeye Collins & Amy Adams in the secret of the long lost cousin & other mysteries
1983
ISBN 9780915658817
Hawkeye Collins & Amy Adams in The case of the famous chocolate chip cookies & 8 other mysteries
1983
ISBN 9780915658152
Hawkeye Collins & Amy Adams in the case of the mysterious dognapper & other mysteries
1983
ISBN 9780915658954
Secret of the Software Spy (Can You Solve the Mystery?)
1994
ISBN 9781562391799
The Secret of the Long-Lost Cousin & Other Mysteries
2006
ISBN 9781599611457
The Secret of the Long-Lost Cousin Can You Solve the Mystery #1
2013
ISBN 9781442468993