SLG are proud to present the first three leaflets in our new series Key Issues. These little booklets are meant to be taster introductions to some important subjects you need to know as professionals. Written by members of the SLG Committee, they all give a short introduction to the subject, and further links if you want to know more. These three leaflets deal with Cataloguing and Classification written by Sarah Pavey, Using Twitter written by Caroline Roche and Impact Evaluation written by
Lucy Chambers. I hope you find these three useful, and look out for more in the series coming soon!