A Bescherelle is a French language grammar reference book best known for its verb conjugations volumes.
The series is made up of three volumes dealing with various aspects of French grammar.
The second volume, L'orthographe pour tous (Spelling for All) explains how to convert spoken sounds in French into writing.
Bescherelles (L'art de conjuguer in particular) are commonly used in French immersion schools, and it is often required for students to purchase one for class.
Bescherelles also exist on the grammars of German, English, Spanish, Italian, Portuguese, Arabic and Latin although they are less popular than that of the original French.