Sam was Kate's best friend since they met at school, together they grew, had children and Sam was there as Kate married Jack. But one autumn Sam vanished after a row, leaving her children behind and Kate stepped in. With Lily's help Kate has coped with her own children and Sam's but at a cost. Jack has left her and she's struggling when Sam suddenly reappears and Kate's world is torn apart as magic is made real and Lily isn't who she seems to be, and neither is Sam. As the demonic Ametsam relentlessly pursues them it takes more than one of the three friends to find him and even then the journey isn't easy and lives get more tangled than they could imagine and in ways they never dreamed. The Portal Between is the first book in the Portal series and Sarah Barnard's debut novel.