Roy J. Snell (1878-1959) authored at least 85 Young Adult novels under his own name and as by David O\'Hara, James Craig, and Joseph Marino, most of them specifically directed to boys, though he wrote at least one series of mysteries for girls. His tales for younger children, beginning with Little White Fox and his Arctic Friends (1916), are animal Fantasies.
A Hanging at Dawn
The Helena Diaries (Ghost-in-Law 1.50)
Books Can Be Deceiving
Payback's a Witch
Divided in Death (In Death 18)
Disillusioned, A Stan Turner Mystery Vol 2
Death Makes A Mistake
Witch is How To Lose Big