Two things occurred when I recently picked up Monisha Rajesh&rsquos second book. First, a long-lost friend called to say she was planning on taking the Himsagar Express from Jammu to Kanyakumari or the Vivek Express from Dibrugarh to Kanyakumari sometime this year and wanted tips on planning given my profession, and, second, my social-media feed showed a man walking across a frozen Lake Baikal, the deepest and largest freshwater lake in the world. Initially, I didn&rsquot really think much of these two instances but as I pored over the pages of Around the World in 80 Trains, the coincidences just seemed odd.