With an estimated 108 million Americans having launched their first diets of the year in recent weeks – and most of us set to make another three to four diet attempts before the year is out – it’s no wonder that the $20 billion weight-loss industry is going strong. Here’s a glimpse at several new books with varying premises, approaches and appeal:

“Thinner This Year,” Chris Crowley and Jen Sacheck

Heavier fare than most diet or exercise books, but the authors, an exercise scientist and a writer who gave us the “Younger Next Year” series, make it worth the effort. Crowley and Sacheck hold our hands through a chatty review of concepts like static stretching, strength training, fast twitch and slow twitch muscle movement, metabolic pathways, etc., then deliver a lot of nutritional know-how in a non-preachy way. $12.95, Workman Publishing.

“The Sugar Smart Diet,” Anne Alexander with Julia VanTine

Just when you think you’ve gotten smart about your food choices, the editors of Prevention magazine remind us that even our favorite healthy food choices are heavily processed and laden with sugar, high-fructose corn syrup and “sugar mimics,” which have the same negative impacts on the body. You’ll become a much better label-reader after only 15 minutes with this edifying volume. The 50 recipes may catch your eye as well. $21.50, Rodale.

“The Juice Cleanse Reset Diet,” Lori Kenyon Farley and Marra St. Clair

If you’ve been feeling curious-yet-cautious about the whole juicing craze, this is your ticket to understanding what it’s all about. This guide outlines the many differences between the processed foods we eat today and earlier versions that were grown in the ground instead of manufactured in labs and factories. $15.99, Ten Speed Press.

“Sleekify! Michael Olajide Jr., with Myatt Murphy

An ode to jumping rope and shadow boxing, Olajide, former middleweight boxer, takes a straightforward approach to pursuing muscle definition with a boxer’s workout regimen. $16, Random House.