A Walrus in Oxford

This is the seventh Little Wychwell Mystery following Did Anyone Die?, A Very Quiet Guest, All that Glisters is Not Silver, Speak of the Wolf, Some People Go Both Ways and Walking Where the Willows Whisper. Walls, who is now a don at Kings, is seeing strange things in both his apartment and his college room. Is something sinister really occurring or has he just been devoting too much time to academic study and gone a little mad? Why has the Walrus, one of the college contemporaries of Barnabus and Walls, reappeared in Oxford? Is this just coincidence? Barnabus, Walls' best friend and also an indefatigable mystery investigator, springs in to help uncover the truth.