Add spaces: Asachildshewasinterestedinbooksandthisledhertoaninterestinscience.

Answer: As a child she was interested in books and this led her to an interest in science.

Add spaces: Book2ofthebestfreebooksseries

Answer: Book 2 of the best free books series

Add spaces: Selectpendrivetorecoverfilesfromit

Answer:
Select pen drive to recover files from it