Magic Tree House is a 29-book series with 29 primary works first released in 1992 with contributions by Mary Pope Osborne, Marcela Brovelli, and 2 others.
1992 • 47 Readers • 68 pages • 3.9
1993 • 31 Readers • 82 pages • 4.1
1995 • 22 Readers • 80 pages • 3.7
1996 • 25 Readers • 82 pages • 4.1
2002 • 25 Readers • 80 pages • 4.1
1997 • 25 Readers • 80 pages • 4.1
1998 • 16 Readers • 96 pages • 4.4
1998 • 15 Readers • 71 pages • 4
1998 • 19 Readers • 74 pages • 4
1998 • 16 Readers • 73 pages • 4.3
1999 • 14 Readers • 96 pages • 3.8
2002 • 15 Readers • 71 pages • 4.2
2003 • 11 Readers • 96 pages • 3.7