Complex sentence: Paul O. Zelinsky took 3 years to complete this book in its entirety he states, "I found that Rapunzel was an even more ambitious project than I knew at the beginning" Peck, Jackie, and Judy Hendershot.
Split into simpler sentences: Paul O. Zelinsky took 3 years to complete this book in its entirety. He states, "I found that Rapunzel was an even more ambitious project than I knew at the beginning" Peck, Jackie, and Judy Hendershot.