Apparitions : 21 stories of ghosts, spirits and mysterious manifestations- with excercises for developing reading comprehension and critical thinking skills / Henry Billings, Melissa Billings, John F. Warner, Margaret B. Warner.

Heroes : 21 true stories of courage and honor--with exercises for developing readling comprehension and critical thinking skills

Heroes : 21 true stories of courage and honor - with exercises for developing critical reading skills.

Disasters : 21 true stories of death and destruction, with exercises for developing readling comprehension and critical thinking skills

Eureka! : 21 stories of momentous discoveries and inventions-- with exercises for developing reading comprehension and critical thinking skills

Deceptions : 21 fascinating stories of trickery and fraud - with exercises for developing critical reading skills

Calamities : 21 stories of disasters that touched the world--with exercises for developing reading comprehension and critical thinking skills