Air Supply is known worldwide for swooning the ladies off their feet. This time, Hitchcock and Russell are taking the festive route, recording some of the most beloved holiday classics of all time. The production standards and performances are polished and no less than what you'd expect from the duo, but of course this will not appeal to some. It's an easily accessible and enjoyable album for both casual listeners and die-hard fans of the group's output. ~ Rob Theakston, All Music Guide
The Book of Love was a serious attempt by Air Supply to regain their position as pre-eminent adult contemporary artists. During the early '90s, they released a couple of records that went ignored, but none were as carefully-considered as The Book of Love, which places them squarely in the '90s adult pop tradition, instead of finding them stuck in the '80s. That alone makes the album worthwhile, but it doesn't excuse the uneven songwriting. There's a few songs that are sparkling updates of the Air Supply formula -- "So Much Love" and "When I Say" both are lush, appealingly melodramatic and sappy ballads that work -- but there are more that simply fall flat. Still, the very fact that some of The Book of Love works makes it Air Supply's best record in nearly a decade. ~ Stephen Thomas Erlewine, All Music Guide
Produced by Harry Maslin, this is actually a pretty decent outing from Air Supply. They're still master of the hook-rife CHR sound, but they've found a rather interesting musical strength somewhere in their down years. they're no longer just a professional pop band -- they've learned to feel things a little better. The consequent sound is still quintessential Air Supply pop, but it's rougher-edged and a lot easier to take. Quite a surprise. They still manage to make Harry Nilsson's "Without You" sound twee and wimpy -- ah well, nobody's perfect. ~ Steven McDonald, All Music Guide