This book is pretty straightforward. The plot is presented from beginning to end without any jumping around, plus the writing style is descriptive, so we're given all the information we need without having to make any crazy assumptions.
That said, the book is speckled with French words and phrases. The important ones are always translated for us—for instance, we learn straightaway that le chien méchant is a crazy dog—but the appearance of a second language throughout the book definitely bumps it up a wee bit in difficulty. This book is also quite comfortable in a restaurant kitchen, so if you're not, it might take a little it to get your bearings. None of this poses major hurdles, though, and as always, we're here to help.