Complex sentence: The first volume of Pride's homeschooling series, "The Big Book of Home Learning", was released in 1986 and had sold 250,000 copies by mid- 1991, and was still subject to journal reviews ten years later.
Split into simpler sentences: The first volume of Pride's homeschooling series, "The Big Book of Home Learning", was released in 1986 and had sold 250,000 copies by mid- 1991. It was still subject to journal reviews ten years later.