“The first sip is joy, the second is gladness, the third is serenity, the fourth is madness, the fifth is ecstasy,” Jack Kerouac wrote of tea in his 1958 novel The Dharma Bums. Late one night that year, he walked five miles with an enormous tape recorder strapped to his back to keep the woman he loved from taking her own life.

Lois Beckwith didn’t die that night. She and Jack soon parted ways as lovers, but remained friends. Eventually, he introduced her to the man who would become her husband. Their son would go on to devote his life to tea.

In Pursuit of Tea founder Sebastian Beckwith fell in love with tea while working as a trekking guide in Bhutan and northern India in the 1980s, and has spent the years since procuring and advocating for the planet’s finest, most sustainably grown and ethically harvested teas. Traveling to and working with small farms in Asia’s most historic tea-growing regions, he sources teas that grace the menus of some of New York City’s finest restaurants and have powered much of my own writing over the years. In his workshops, seminars, and lectures, he has brought the art-science of tea to the American Museum of Natural History, the French Culinary Institute, and Columbia University.

Now, Beckwith harvests the wisdom of his life’s work in A Little Tea Book: All the Essentials from Leaf to Cup (public library) — part practical field guide to choosing, preparing, and enjoying tea, part love letter, co-written with his childhood friend, former firefighter, and Gutsy Girl author Caroline Paul, and splendidly illustrated by Caroline’s wife and my dear friend Wendy MacNaughton.

Radiating from the pages are deep knowledge, good-natured humor, and a largehearted love of tea — the plant, the experience, the ecosystem of botany and labor and ritual, which George Orwell considered “one of the main stays of civilization.” What emerges is an encyclopedia of fact and joy, delving into the cultural and political histories of tea alongside its practical science and daily delights, bridging the sensorial and the spiritual dimensions of this ancient tradition turned modern staple.

Punctuating the book are various curiosities from the history of tea, emanating broader insight into human culture, the nature of creativity, and the serendipitous, often haphazard ways in which new ideas take root. Take, for instance, the story of the tea bag:

Tea bags were invented in the late 1800s but became wildly popular only after a New York tea purveyor named Thomas Sullivan sent samples of tea in silk bags. These were intended to be opened, the tea emptied out and then brewed, but customers instead dropped the bags straight into the water — and then complained that the material did not allow for the tea to steep. Sullivan turned to a more porous cloth and the tea bag was quickly embraced in America (though most of Britain turned up its nose, using loose tea until the mid-1970s.)

There are also invaluable antidotes to various oft-repeated myths, misconceptions, and half-truths — from the elemental fact that the six basic types of tea (white, green, yellow, oolong, black, and dark) all come from a single plant, Camellia sinensis, to the complex matter of caffeine. Beckwith and Paul offer a scientific corrective:

Many of us drink tea to wake up at the beginning of our day. You may even have heard that Camellia sinensis contains more caffeine than coffee beans. This is true, but misleading. We use much less tea than coffee by weight for a serving, so your cup of tea actually has at most one half the amount of caffeine as a cup of coffee. The relative level varies depending on the leaf used (the buds have higher concentrations), the cultivar, the leaf shape (a larger leaf results in a slower infusion because there is less surface area than, say, a fanning tea grade in your cup), and the brew time and technique (since caffeine is water-soluble, the longer tea steeps, the more caffeine is extracted; powdered tea like matcha has more caffeine because the leaves are consumed, not infused). It is important to note that caffeine does not correspond with tea type, so one cannot categorically say that black tea has more than green, or yellow tea has more than white.

Tea also contains the unique calming and relaxing — but not sedative — amino acid theanine, which has been found only in Camellia sinensis and one mushroom, Boletus badius. Theanine has been shown to improve mood and increase focus when combined with caffeine. This may be why tea drinkers often avoid the anxiety and jitters of those who imbibe coffee (known to some of us tea lovers as “devil juice.”)

Complement the lovely Little Tea Book with Orwell’s eleven golden rules for making the perfect cup of tea and the MacNaughton-illustrated field guide to wine, then revisit the touching, improbable story of how Kerouac saved Beckwith’s mother’s life.