Frontmatter -- Contents -- Acknowledgements -- 1. Introduction -- 2. The Simultaneous Effects of Age, Context, Transparency and Frequency on Idiom Comprehension in a First and Second Language -- 3. Do Multimodal and Visualization Techniques Enhance Students' Comprehension and Retention of L2 Idioms? -- 4. Persisting Ignorance and (Partial) Misinterpretations of L2 Idioms After Treatment -- 5. L2 Comprehension of Creative Idiom Variants -- 6. Productive Mastery of L2 Idioms in Free Composition Writing -- 7. Summing Up and Directions for Future Research -- References -- Author Index -- Subject Index