This is a great book, really two love stories spanning two generations set in North Borneo (WWII, now Malaysia), Vancouver and The Netherlands. It is a compelling story of secrets and sorrows of the past, and grief and loss (a phrase: “ routine .. to keep their thoughts contained”). This may be the only time I have recommended two books by the same author in a single month.
https://www.goodreads.com/book/show/474662.Certainty?from_search=true