Lonely Planet is a renowned budget travel book series that provides in-depth city guides and practical tips for budget-minded travelers worldwide.

Matt Kepnes is the author of \"Nomadic Matt: How to Travel the World on $50 a Day\", a popular budget travel blog and book that offers practical advice and tips for affordable worldwide travel.

Green Travel Guides is a series of budget travel guidebooks that emphasizes sustainable and responsible travel practices, providing information on eco-friendly accommodations, transportation, and activities.

Insight Guides is a budget travel book series that offers guides to specific regions or countries, providing detailed maps, cultural insights, and practical travel tips.

Hostels Worldwide is a budget travel book series that provides information on budget-friendly accommodations, including hostels, guesthouses, and budget hotels, catering to budget-conscious travelers.

City Guides is a budget travel book series that provides guides to specific cities, offering comprehensive coverage of attractions, restaurants, activities, and practical travel information.

Adventure Travel Guides is a budget travel book series that focuses on adventure travel, providing information on outdoor activities, adventure sports, and off-the-beaten-path destinations.

Country Guides is a budget travel book series that provides guides to specific countries, offering in-depth cultural insights, practical travel advice, and information on attractions, activities, and accommodations.

Budget Transportation Guides is a budget travel book series that focuses on budget-friendly transportation options, providing information on buses, trains, budget airlines, and other affordable ways to travel.

Authentic Travel Guides is a budget travel book series that provides guides to specific regions or countries, emphasizing local experiences, cultural immersion, and authentic travel opportunities.

Budget Food Guides is a budget travel book series that focuses on budget-friendly food options, providing information on street food, local markets, affordable restaurants, and tips for saving money on food while traveling.

City Maps and Walking Tours is a budget travel book series that provides guides to specific cities, offering detailed maps, walking tours, and practical travel advice, including information on attractions, restaurants, and accommodations.

Free and Low-Cost Activities Guides is a budget travel book series that focuses on budget-friendly activities and attractions, providing information on free or low-cost museums, parks, cultural events, and other affordable ways to experience a destination.

Sustainable Travel Guides is a budget travel book series that provides guides to specific regions or countries, emphasizing sustainable and responsible tourism practices, including information on eco-friendly accommodations, transportation, and activities.

Budget Shopping Guides is a budget travel book series that focuses on budget-friendly shopping options, providing information on local markets, thrift stores, outlet malls, and tips for finding great deals while traveling.