Hi, it's great to hear that you're planning a trip to beautiful Turkey. Here are some detailed travel tips for your visit to Amasra, Safranbolu, Inebolu, and Sinop:

Best Time to Visit:
The best time to visit these lovely Turkish towns is from late spring to early autumn (April to October). You'll be able to enjoy all outdoor activities in this period, especially the clear, sunny beach days in Amasra. For Safranbolu and Sinop, you'll enjoy the charming old towns in pleasant and mellow sunlight.

Route and Accessibility:
Turkey has an efficient bus and train system that interconnects its cities. From Istanbul, you can first head to Safranbolu by bus. After exploring Safranbolu, you can take another bus to Amasra. For Inebolu and Sinop, travel by bus or rent a car for a more enjoyable journey along the scenic Black Sea coastline.

Accommodation and Booking:
There are many options for accommodations in these towns ranging from luxury hotels to less expensive pensions and guesthouses. Booking online via different hotel booking websites is the most convenient way. Make sure to book well ahead of your travel dates during peak season.

Clothing and Essentials:
Given the weather conditions from April to October, you can pack lightweight clothes, swimsuits, sunscreen, a hat, and comfortable footwear for exploring the towns by foot. Don't forget a good camera to capture the charming townscapes and beautiful shorelines.

Health and Safety:
These towns are generally very safe. However, it never hurts to practice safe habits such as keeping your valuables safe, especially in crowded places. Pack all necessary prescriptions and medications. Turkey has a good healthcare system should you need medical attention.

Local Etiquette and Respect:
Turkish people are very warm and hospitable. It's polite to greet people with a firm handshake, direct eye contact and a cheerful 'Merhaba' (hello). As a sign of respect, dress modestly when visiting religious sites.