On behalf of the editors of IUCr Journals and the staff at the IUCr in Chester, we are writing to thank you for your invaluable contribution to the journals in your role as reviewer.

2015 has again been an important year for crystallography, in which we have celebrated the 100th anniversary of the award of the Nobel Prize to the Braggs, and continued with many of the initiatives started during the International Year of Crystallography in 2014. Your efforts have allowed us to publish nearly 14500 pages and 3000 articles in the year, including over 80 articles in IUCrJ.

Effective peer review is crucial for the scientific community. We greatly appreciate the important role you play in the publication of accurate peer-reviewed material.

To express our gratitude, we should like to offer you the following:

• A voucher for 50% discount on the open-access fee for publication in IUCrJ. Your voucher code is dis-K8gNXZTRvfWCUvjq7e1, which is valid until 31 December 2016. Please follow the links at www.iucrj.org to submit your paper.
  
  
• A voucher for 20% discount on the open-access fees for publication of articles in any other IUCr Journal. Your discount voucher code is dis-pf2gP4AGqwzaq2XsRtn, which is valid until 31 December 2016.

Finally, in 2016 we will be conducting a survey into ways in which we can provide recognition for reviewers. If you would be interested in taking part in the survey, please let us know.

Seasons greetings and best wishes for a happy and prosperous 2016!

Samar Hasnain
Editor-in-chief

Peter Strickland
Executive Managing Editor

Image from S. B. Larson, J. S. Day and A. McPherson (2014). Satellite tobacco mosaic virus refined to 1.4 Å resolution. Acta Cryst. D70, 2316–2330.