New in paperback. Hardcover was published in 2019. The chapters in the book delve into different aspects of idiomatic mastery: students' comprehension of canonically used idioms in both their first and second language; the effects of multimedia and visualization techniques on learners' comprehension and retention of L2 idioms; students' misinterpretations of L2 idioms; L2 learners' comprehension of creative idiom variants and their use of idioms in free composition writing.