This study aimed to compare reading strategies and habits regarding reading achievement of selected age-group participants from the Programme for International Student Assessment (PISA) 2009 and the International Assessment of Adult Competencies (PIAAC) 2015 within Turkey. A cohort design was utilized because it was assumed that reading literacy from PISA and PIAAC were comparable, as well as that participants from PISA 2009 would be in the age range of participants at the time of PIAAC in 2015. The participant population selected from PISA 2009 for the current study consisted of 4719 Turkish students (2334 girls, 2385 boys) aged 15 years old. Those chosen from PIAAC 2015 consisted of 308 Turkish individuals (141 men, 167 women) aged 20-22 years old. Data analysis was conducted through latent class analysis based on participants' gender, the number of books in the home, and reading achievement. Results revealed that female participants were more successful than male participants in PISA, whereas male participants outperformed female participants in PIAAC.