| The Mystery of Lost River Canyon
Harry Castlemon | |
| The Mystery of M. Felix
B. L. Farjeon | |
| The Mystery of Mary
Grace Livingston Hill | |
| The Mystery of Mary Stuart
Andrew Lang | |
| The Mystery of Metropolisville
Edward Eggleston | |
| The Mystery of Monastery Farm
H. R. Naylor | |
| The Mystery of Mrs. Blencarrow
Mrs. Oliphant | |
| The Mystery of Murray Davenport: A Story of New York at the Present Day
Robert Neilson Stephens | |
| The Mystery of Orcival
Emile Gaboriau | |
| The Mystery of Seal Islands
Harrison Bardwell |
