You can do this challenge in any way you want. There are lots of resources online to create a daily Bible study customized for your start and end dates. Or, here's a plan to read the 66 books of the Bible in 42 weeks, by whole books. You can also download a copy below.
Week 1: Genesis
Week 2: Exodus
Week 3: Leviticus
Week 4 : Numbers
Week 5: Deuteronomy
Week 6: Joshua, Judges & Ruth
Week 7: 1 Samuel & 2 Samuel
Week 8: 1 Kings & 2 Kings
Week 9: 1 Chronicles & 2 Chronicles
Week 10: Ezra, Nehemiah & Esther
Week 11: Job
Week 12: Psalms 1-118
Week 13: Psalms 119-150
Week 14: Proverbs, Ecclesiastes & Song of Solomon
Week 15: Isaiah 1-35
Week 16: Isaiah 36-66
Week 17: Jeremiah 1-25
Week 18: Jeremiah 26-52 & Lamentations
Week 19: Ezekiel 1-28
Week 20: Ezekiel 29-48
Week 21: Daniel
Week 22: Hosea, Joel, Amos, Obadiah & Jonah
Week 23: Micah, Nahum, Habakkuk, Zephaniah, Haggai, Zechariah, Malachi
Week 24: Matthew
Week 25: Mark
Week 26: Luke
Week 27: John
Week 28: Acts
Week 29: Romans
Week 38: 1 Corinthians
Week 31: 2 Corinthians
Week 32: Galatians
Week 33: Ephesians
Week 34: Philippians
Week 35: Colossians
Week 36: 1 Thessalonians & 2 Thessalonians
Week 37: 1 Timothy & 2 Timothy
Week 38: Titus & Philemon
Week 39: Hebrews
Week 40: James, 1 Peter & 2 Peter
Week 41: 1, 2 & 3rd John and Jude
Week 42: Revelation