You can search for Tadoku books in Library Search. In Library Search, select Books and Media and search for "tadoku."

From the main entrance of the library, go straight until you reach the second stairwell. Turn right past the study tables and computers until you reach the book stacks. The Tadoku readers are on the end of the bookcase next to reference materials. You can find them on the map below where the red and yellow star is.

Each book has a sticker on the spine indicating its Tadoku reading level.