The free Explore App put out by the Good Book Company is devotional app that takes you through various books of the Bible. The app itself is free and some of their devotional samplers are free. The 1 Samuel devotional costs you$1.99 that can be purchased within the app gives you 40 days of devotionals. https://www.thegoodbook.com/daily-devotional-reading/explore/explore-app
Books and Commentaries
Here some links to a book and two commentaries that you may find helpful.