This dataset contains the native English speaker (L1) adult subset of the Reading Brain Project (RBP) data, focusing on 52 participants who underwent two sessions of testing: MRI scanning and behavioral tests, collected 2-3 days apart. During the first session, following the scanning of structural (T1-weighted) and resting-state data, participants performed a reading task with simultaneous eye-tracking and fMRI scanning, and the session ended with a diffusion tensor imaging (DTI) scan. The second session consisted of only behavioral tests, including five standardized tests: the Attention Network Test (ANT), Gray's Silent Reading Test (GSRT), Letter-Number Sequencing (LNS), Peabody Picture Vocabulary Test (PPVT-4), and Tower of Hanoi (ToH), followed by a survey: Reading Background Questionnaire (RBQ), which includes familiarity rating for the topics of our five reading texts. The raw data are all provided here. An updated version of the methodology document will be available at http://blclab.org/reading_brain under L1 Adult dataset/