#2
1 Reader
#3
#4
#5
#6
6 Readers • 4
#7
#8
#9
#10
1994 • 1 Reader • 128 pages
#11
1986 • 1 Reader • 32 pages
#12
3 Physical & Behavioral Adaptation
2014 • 1 Reader • 32 pages
#13
1961 • 5 Readers • 168 pages
#14
1999 • 2 Readers • 192 pages
#15
1966 • 1 Reader • 95 pages
#16
#17
Planned book #29 of 18 in U.S. Landmark Books
1 Reader
#18
#19
#20
2000 • 1 Reader
#21
#22
2014 • 2 Readers • 45 pages • 3
#23
1949 • 4 Readers • 32 pages • 3
#24
#25
2011 • 1 Reader
#26
2000 • 1 Reader • 85 pages
#27
#28
#29
#30
1 Reader
#31
#24 of 38 in Magic Tree House
2001 • 22 Readers • 72 pages • 4
#32
3 Readers • 3.5
#33
#5 of 25 in I Survived
2012 • 8 Readers • 112 pages • 3.4
#34
2006 • 1 Reader
#35
#36
1990 • 1 Reader • 111 pages
#37
2013 • 1 Reader
#38
2019 • 2 Readers • 5
#39
2019 • 2 Readers • 40 pages • 4
#40
1992 • 1 Reader • 85 pages
#41
2 Readers • 5
#42
1994 • 1 Reader • 32 pages
#43
2001 • 1 Reader • 40 pages
#44
2019 • 3 Readers • 48 pages
#45
1956 • 3 Readers • 148 pages