Whilst it’s not easy to write this sort of multi-strand novel, the rewards are well worth the effort. A multiple timeline novel benefits from an enhanced narrative, with extra depth added to each storyline, resulting in a satisfying overall reading experience. Readers who may enjoy different genres can find more to interest them in a novel comprising different time periods or locations.
As a writer, the task of creating two, shorter length novellas, each with their own distinct characters and plotlines, can help to maintain focus. It also gives you the opportunity to hone your skills in writing from different narrative perspectives.
Dual and multiple timeline novels are highly commercial, and consistently sought by publishers.
Top tips for writing a dual or multiple timeline novel – The History Quill
I enjoy both reading and writing dual timelines. How about you?
Sharon E. Cathcart 
I think it is being overdone these days. Too many authors just don’t get that sometimes, a second timeline isn’t necessary, and is often distracting. They might do better with an epilogue instead. But yes, when done right, it can be marvelous.
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