Angie W's Easy readers to go along with SL-4 

ICRH = I Can Read History book, level 3 
SIR = Step into Reading, level is listed afterwards 
MTH = Magic Treehouse 

These books are mostly solid 2nd grade level, but a few 
are beginning 3rd grade level. 

Chang's Paper Pony, ICRH 
Secret Valley (Bulla) 
Follow the Drinking Gourd, ICRH 
Escape North, SIR3 
Clipper Ship, SIR3 
Abe Lincoln's Hat, SIR3 
Civil War on Sunday, MTH 
Wagon Wheels, ICRH, SL2 Reg Reader 
Abigail Takes the Wheel, ICRH 
The Big Balloon Race, ICRH, SL2 Reg Reader 
The Long Way to a New Land, ICRH 
The Long Way Westward, ICRH 
Twister on Tuesday, MTH 
Earthquake in the Early Morning, MTH 
First Flight, ICRH 
Dust for Dinner, ICRH 
Moonwalk, SIR4